When using a microphone for live sound amplification, there will be a microphone howling problem (the line signal positive feedback causes the self-excited howling to not be discussed this time). It is popular to say that this is when the sound signal is sent out from the speaker and then input again from the microphone. After the amplification system, it is amplified again to form a signal superposition, which produces positive feedback and whistle. The sound workers have been trying to solve this problem in various ways and equipment, but it is not very ideal, according to my own experience. There are several ways to summarize, you can choose to try:
1. Feedback suppressor: Its working principle is to suppress the occurrence of howling by suppressing the occurrence of several or more than a few frequency points exceeding the preset level value in the signal. Fixed microphone placement and conference amplification still have some effect, but the effect on the stage performance is not good or even ruin the performance, because the actors are different places in the stage performances, Frequency tracking is very difficult. Secondly, when the actors are singing (especially those rock singers), the dynamics are very large. This will make the level values ​​of many frequency points not overloaded by howling. At this time, the feedback suppressor will mistakenly think that There was a howling and the suppression of these frequencies caused the sound pressure collapse of the performance and the effect of normal performance.
2. Frequency shifter: It works by shifting the frequency of the microphone signal up or down by several or dozens of frequency points to achieve no positive feedback. This method is also only suitable for conference amplification. Use it, because during the performance, the effect of the frequency change produced by the frequency shifter will be very funny, which will make everyone unable to find the north.
3. Automatic mixing console: Its working principle is to use the automatic delay noise gate to open/break the microphone with signal input and no signal input to achieve the purpose of eliminating howling. This method is very suitable for use in microphones. Using a large number of conference venues, language programs can also be used during stage performances, but they are not effective for song and dance programs (see the Noise Gate for reasons).
4. Noise Gate: Its working principle is to use the threshold level to turn on/off the microphone signal to eliminate the whistle. This method is generally used for the pickup of the drum (using the drum source to pick up the sound). Not in this column), only when the drum is hit, the microphone will be turned on, preventing the positive feedback between the stage returning speaker and the drum kit microphone and whistling, but it is not good for the song and dance program because there is The actor's voice is very light. At this time, because the threshold level of the noise gate is not reached, the noise door will not be turned on, which will cause the scene to "disappear".
5. Compressor: Its working principle is that when the signal exceeds the set level value, the compressor begins to proportionally compress the signal to prevent the signal from continuing to expand to eliminate the whistle. This method can be used on the stage. The performance of the song and dance program, but the beginning of the whistle that did not reach the set level can not do anything.
6. Graphic equalizer: Its working principle is to attenuate or cut off some frequency points of howling to achieve the purpose of preventing howling, but its disadvantage is that the frequency setting is fixed and the frequency of howling occurs. The point is not fixed, it may appear in the first 3/4 or 1/2 or the last 3/4 of the two frequencies...so sometimes it is necessary to attenuate the two adjacent frequencies, then the icon The bandwidth of the equalizer is relatively large. After attenuating or cutting off some frequency points, the frequency collapses and is distorted. Therefore, the graphic equalizer is only suitable for some occasions where the requirements for sound amplification are not high.
7. Parametric equalizer: It works by sweeping the sweeper to the frequency at which the howling occurs, and adjusting the bandwidth of the point, then attenuating or cutting the point to achieve both whistling and useful The signal is not attenuated or cut off, so the parametric equalizer is suitable for various occasions.
These are some of my experience in eliminating whistling. Of course, I have to decide according to the actual situation, including testing. I suggest not to use the dedicated test microphone for the whistle point test, but to test with the microphone used in the field, because the actor is It’s impossible to test the microphone to sing,
In addition, the way of connection, etc., also needs to be practiced. The method I usually use is: the parametric equalizer + compressor is connected to the breakpoint of the microphone input path (one set per microphone ), the drum path + noise gate, Of course, the equipment needed to do so has a lot of capital investment. You can choose to use the equipment and methods according to your specific situation (maybe there is a better way).
The problem of easy whistling on the chest (collar clip) is related to the directionality of the chest and the pickup level. Generally, the chest has a wide directionality (omnidirectional or fan-shaped) and the chest. When used, it is usually clipped on the clothes on the chest or on the collar. The actor's mouth is far away, so the output level of the chest and the input level of the mixer are relatively large. Therefore, the chest is whistling. The possibility is relatively large. If this happens, the level of the above two places can be slightly reduced, and the performance of the performance can be ensured without whistling. In addition, the directionality of the chest mentioned above is pointed. Some chests are used for conferences and teaching. Its gimmicks are usually small in the electret. This kind of chest is never used for stage performance. The vocals are distorted and the most audible. Called, and the chest for the stage performance is capacitive or moving, without distortion or so easy to whistle. When using a microphone for live sound amplification, there will be a microphone howling problem (the line signal positive feedback causes the self-excited howling to not be discussed this time). It is popular to say that this is when the sound signal is sent out from the speaker and then input again from the microphone. After the amplification system, it is amplified again to form a signal superposition, which produces positive feedback and whistle. The sound workers have been trying to solve this problem in various ways and equipment, but it is not very ideal, according to my own experience. There are several ways to summarize, you can choose to try:
1. Feedback suppressor: Its working principle is to suppress the occurrence of howling by suppressing the occurrence of several or more than a few frequency points exceeding the preset level value in the signal. Fixed microphone placement and conference amplification still have some effect, but the effect on the stage performance is not good or even ruin the performance, because the actors are different places in the stage performances, Frequency tracking is very difficult. Secondly, when the actors are singing (especially those rock singers), the dynamics are very large. This will make the level values ​​of many frequency points not overloaded by howling. At this time, the feedback suppressor will mistakenly think that There was a howling and the suppression of these frequencies caused the sound pressure collapse of the performance and the effect of normal performance.
2. Frequency shifter: It works by shifting the frequency of the microphone signal up or down by several or dozens of frequency points to achieve no positive feedback. This method is also only suitable for conference amplification. Use it, because during the performance, the effect of the frequency change produced by the frequency shifter will be very funny, which will make everyone unable to find the north.
3. Automatic mixing console: Its working principle is to use the automatic delay noise gate to open/break the microphone with signal input and no signal input to achieve the purpose of eliminating howling. This method is very suitable for use in microphones. Using a large number of conference venues, language programs can also be used during stage performances, but they are not effective for song and dance programs (see the Noise Gate for reasons).
4. Noise Gate: Its working principle is to use the threshold level to turn on/off the microphone signal to eliminate the whistle. This method is generally used for the pickup of the drum (using the drum source to pick up the sound). Not in this column), only when the drum is hit, the microphone will be turned on, preventing the positive feedback between the stage returning speaker and the drum kit microphone and whistling, but it is not good for the song and dance program because there is The actor's voice is very light. At this time, because the threshold level of the noise gate is not reached, the noise door will not be turned on, which will cause the scene to "disappear".
5. Compressor: Its working principle is that when the signal exceeds the set level value, the compressor begins to proportionally compress the signal to prevent the signal from continuing to expand to eliminate the whistle. This method can be used on the stage. The performance of the song and dance program, but the beginning of the whistle that did not reach the set level can not do anything.
6. Graphic equalizer: Its working principle is to attenuate or cut off some frequency points of howling to achieve the purpose of preventing howling, but its disadvantage is that the frequency setting is fixed and the frequency of howling occurs. The point is not fixed, it may appear in the first 3/4 or 1/2 or the last 3/4 of the two frequencies...so sometimes it is necessary to attenuate the two adjacent frequencies, then the icon The bandwidth of the equalizer is relatively large. After attenuating or cutting off some frequency points, the frequency collapses and is distorted. Therefore, the graphic equalizer is only suitable for some occasions where the requirements for sound amplification are not high.
7. Parametric equalizer: It works by sweeping the sweeper to the frequency at which the howling occurs, and adjusting the bandwidth of the point, then attenuating or cutting the point to achieve both whistling and useful The signal is not attenuated or cut off, so the parametric equalizer is suitable for various occasions.
These are some of my experience in eliminating whistling. Of course, I have to decide according to the actual situation, including testing. I suggest not to use the dedicated test microphone for the whistle point test, but to test with the microphone used in the field, because the actor is It’s impossible to test the microphone to sing,
In addition, the way of connection, etc., also needs to be practiced. The method I usually use is: the parametric equalizer + compressor is connected to the breakpoint of the microphone input path (one set per microphone ), the drum path + noise gate, Of course, the equipment needed to do so has a lot of capital investment. You can choose to use the equipment and methods according to your specific situation (maybe there is a better way).
The problem of easy whistling on the chest (collar clip) is related to the directionality of the chest and the pickup level. Generally, the chest has a wide directionality (omnidirectional or fan-shaped) and the chest. When used, it is usually clipped on the clothes on the chest or on the collar. The actor's mouth is far away, so the output level of the chest and the input level of the mixer are relatively large. Therefore, the chest is whistling. The possibility is relatively large. If this happens, the level of the above two places can be slightly reduced, and the performance of the performance can be ensured without whistling. In addition, the directionality of the chest mentioned above is pointed. Some chests are used for conferences and teaching. Its gimmicks are usually small in the electret. This kind of chest is never used for stage performance. The vocals are distorted and the most audible. Called, and the chest for the stage performance is capacitive or moving, without distortion or so easy to whistle. When using a microphone for live sound amplification, there will be a microphone howling problem (the line signal positive feedback causes the self-excited howling to not be discussed this time). It is popular to say that this is when the sound signal is sent out from the speaker and then input again from the microphone. After the amplification system, it is amplified again to form a signal superposition, which produces positive feedback and whistle. The sound workers have been trying to solve this problem in various ways and equipment, but it is not very ideal, according to my own experience. There are several ways to summarize, you can choose to try:
1. Feedback suppressor: Its working principle is to suppress the occurrence of howling by suppressing the occurrence of several or more than a few frequency points exceeding the preset level value in the signal. Fixed microphone placement and conference amplification still have some effect, but the effect on the stage performance is not good or even ruin the performance, because the actors are different places in the stage performances, Frequency tracking is very difficult. Secondly, when the actors are singing (especially those rock singers), the dynamics are very large. This will make the level values ​​of many frequency points not overloaded by howling. At this time, the feedback suppressor will mistakenly think that There was a howling and the suppression of these frequencies caused the sound pressure collapse of the performance and the effect of normal performance.
2. Frequency shifter: It works by shifting the frequency of the microphone signal up or down by several or dozens of frequency points to achieve no positive feedback. This method is also only suitable for conference amplification. Use it, because during the performance, the effect of the frequency change produced by the frequency shifter will be very funny, which will make everyone unable to find the north.
3. Automatic mixing console: Its working principle is to use the automatic delay noise gate to open/break the microphone with signal input and no signal input to achieve the purpose of eliminating howling. This method is very suitable for use in microphones. Using a large number of conference venues, language programs can also be used during stage performances, but they are not effective for song and dance programs (see the Noise Gate for reasons).
4. Noise Gate: Its working principle is to use the threshold level to turn on/off the microphone signal to eliminate the whistle. This method is generally used for the pickup of the drum (using the drum source to pick up the sound). Not in this column), only when the drum is hit, the microphone will be turned on, preventing the positive feedback between the stage returning speaker and the drum kit microphone and whistling, but it is not good for the song and dance program because there is The actor's voice is very light. At this time, because the threshold level of the noise gate is not reached, the noise door will not be turned on, which will cause the scene to "disappear".
5. Compressor: Its working principle is that when the signal exceeds the set level value, the compressor begins to proportionally compress the signal to prevent the signal from continuing to expand to eliminate the whistle. This method can be used on the stage. The performance of the song and dance program, but the beginning of the whistle that did not reach the set level can not do anything.
6. Graphic equalizer: Its working principle is to attenuate or cut off some frequency points of howling to achieve the purpose of preventing howling, but its disadvantage is that the frequency setting is fixed and the frequency of howling occurs. The point is not fixed, it may appear in the first 3/4 or 1/2 or the last 3/4 of the two frequencies...so sometimes it is necessary to attenuate the two adjacent frequencies, then the icon The bandwidth of the equalizer is relatively large. After attenuating or cutting off some frequency points, the frequency collapses and is distorted. Therefore, the graphic equalizer is only suitable for some occasions where the requirements for sound amplification are not high.
7. Parametric equalizer: It works by sweeping the sweeper to the frequency at which the howling occurs, and adjusting the bandwidth of the point, then attenuating or cutting the point to achieve both whistling and useful The signal is not attenuated or cut off, so the parametric equalizer is suitable for various occasions.
These are some of my experience in eliminating whistling. Of course, I have to decide according to the actual situation, including testing. I suggest not to use the dedicated test microphone for the whistle point test, but to test with the microphone used in the field, because the actor is It’s impossible to test the microphone to sing,
In addition, the way of connection, etc., also needs to be practiced. The method I usually use is: the parametric equalizer + compressor is connected to the breakpoint of the microphone input path (one set per microphone ), the drum path + noise gate, Of course, the equipment needed to do so has a lot of capital investment. You can choose to use the equipment and methods according to your specific situation (maybe there is a better way).
The problem of easy whistling on the chest (collar clip) is related to the directionality of the chest and the pickup level. Generally, the chest has a wide directionality (omnidirectional or fan-shaped) and the chest. When used, it is usually clipped on the clothes on the chest or on the collar. The actor's mouth is far away, so the output level of the chest and the input level of the mixer are relatively large. Therefore, the chest is whistling. The possibility is relatively large. If this happens, the level of the above two places can be slightly reduced, and the performance of the performance can be ensured without whistling. In addition, the directionality of the chest mentioned above is pointed. Some chests are used for conferences and teaching. Its gimmicks are usually small in the electret. This kind of chest is never used for stage performance. The vocals are distorted and the most audible. Called, and the chest for the stage performance is capacitive or moving, without distortion or so easy to whistle.
1. Feedback suppressor: Its working principle is to suppress the occurrence of howling by suppressing the occurrence of several or more than a few frequency points exceeding the preset level value in the signal. Fixed microphone placement and conference amplification still have some effect, but the effect on the stage performance is not good or even ruin the performance, because the actors are different places in the stage performances, Frequency tracking is very difficult. Secondly, when the actors are singing (especially those rock singers), the dynamics are very large. This will make the level values ​​of many frequency points not overloaded by howling. At this time, the feedback suppressor will mistakenly think that There was a howling and the suppression of these frequencies caused the sound pressure collapse of the performance and the effect of normal performance.
2. Frequency shifter: It works by shifting the frequency of the microphone signal up or down by several or dozens of frequency points to achieve no positive feedback. This method is also only suitable for conference amplification. Use it, because during the performance, the effect of the frequency change produced by the frequency shifter will be very funny, which will make everyone unable to find the north.
3. Automatic mixing console: Its working principle is to use the automatic delay noise gate to open/break the microphone with signal input and no signal input to achieve the purpose of eliminating howling. This method is very suitable for use in microphones. Using a large number of conference venues, language programs can also be used during stage performances, but they are not effective for song and dance programs (see the Noise Gate for reasons).
4. Noise Gate: Its working principle is to use the threshold level to turn on/off the microphone signal to eliminate the whistle. This method is generally used for the pickup of the drum (using the drum source to pick up the sound). Not in this column), only when the drum is hit, the microphone will be turned on, preventing the positive feedback between the stage returning speaker and the drum kit microphone and whistling, but it is not good for the song and dance program because there is The actor's voice is very light. At this time, because the threshold level of the noise gate is not reached, the noise door will not be turned on, which will cause the scene to "disappear".
5. Compressor: Its working principle is that when the signal exceeds the set level value, the compressor begins to proportionally compress the signal to prevent the signal from continuing to expand to eliminate the whistle. This method can be used on the stage. The performance of the song and dance program, but the beginning of the whistle that did not reach the set level can not do anything.
6. Graphic equalizer: Its working principle is to attenuate or cut off some frequency points of howling to achieve the purpose of preventing howling, but its disadvantage is that the frequency setting is fixed and the frequency of howling occurs. The point is not fixed, it may appear in the first 3/4 or 1/2 or the last 3/4 of the two frequencies...so sometimes it is necessary to attenuate the two adjacent frequencies, then the icon The bandwidth of the equalizer is relatively large. After attenuating or cutting off some frequency points, the frequency collapses and is distorted. Therefore, the graphic equalizer is only suitable for some occasions where the requirements for sound amplification are not high.
7. Parametric equalizer: It works by sweeping the sweeper to the frequency at which the howling occurs, and adjusting the bandwidth of the point, then attenuating or cutting the point to achieve both whistling and useful The signal is not attenuated or cut off, so the parametric equalizer is suitable for various occasions.
These are some of my experience in eliminating whistling. Of course, I have to decide according to the actual situation, including testing. I suggest not to use the dedicated test microphone for the whistle point test, but to test with the microphone used in the field, because the actor is It’s impossible to test the microphone to sing,
In addition, the way of connection, etc., also needs to be practiced. The method I usually use is: the parametric equalizer + compressor is connected to the breakpoint of the microphone input path (one set per microphone ), the drum path + noise gate, Of course, the equipment needed to do so has a lot of capital investment. You can choose to use the equipment and methods according to your specific situation (maybe there is a better way).
The problem of easy whistling on the chest (collar clip) is related to the directionality of the chest and the pickup level. Generally, the chest has a wide directionality (omnidirectional or fan-shaped) and the chest. When used, it is usually clipped on the clothes on the chest or on the collar. The actor's mouth is far away, so the output level of the chest and the input level of the mixer are relatively large. Therefore, the chest is whistling. The possibility is relatively large. If this happens, the level of the above two places can be slightly reduced, and the performance of the performance can be ensured without whistling. In addition, the directionality of the chest mentioned above is pointed. Some chests are used for conferences and teaching. Its gimmicks are usually small in the electret. This kind of chest is never used for stage performance. The vocals are distorted and the most audible. Called, and the chest for the stage performance is capacitive or moving, without distortion or so easy to whistle. When using a microphone for live sound amplification, there will be a microphone howling problem (the line signal positive feedback causes the self-excited howling to not be discussed this time). It is popular to say that this is when the sound signal is sent out from the speaker and then input again from the microphone. After the amplification system, it is amplified again to form a signal superposition, which produces positive feedback and whistle. The sound workers have been trying to solve this problem in various ways and equipment, but it is not very ideal, according to my own experience. There are several ways to summarize, you can choose to try:
1. Feedback suppressor: Its working principle is to suppress the occurrence of howling by suppressing the occurrence of several or more than a few frequency points exceeding the preset level value in the signal. Fixed microphone placement and conference amplification still have some effect, but the effect on the stage performance is not good or even ruin the performance, because the actors are different places in the stage performances, Frequency tracking is very difficult. Secondly, when the actors are singing (especially those rock singers), the dynamics are very large. This will make the level values ​​of many frequency points not overloaded by howling. At this time, the feedback suppressor will mistakenly think that There was a howling and the suppression of these frequencies caused the sound pressure collapse of the performance and the effect of normal performance.
2. Frequency shifter: It works by shifting the frequency of the microphone signal up or down by several or dozens of frequency points to achieve no positive feedback. This method is also only suitable for conference amplification. Use it, because during the performance, the effect of the frequency change produced by the frequency shifter will be very funny, which will make everyone unable to find the north.
3. Automatic mixing console: Its working principle is to use the automatic delay noise gate to open/break the microphone with signal input and no signal input to achieve the purpose of eliminating howling. This method is very suitable for use in microphones. Using a large number of conference venues, language programs can also be used during stage performances, but they are not effective for song and dance programs (see the Noise Gate for reasons).
4. Noise Gate: Its working principle is to use the threshold level to turn on/off the microphone signal to eliminate the whistle. This method is generally used for the pickup of the drum (using the drum source to pick up the sound). Not in this column), only when the drum is hit, the microphone will be turned on, preventing the positive feedback between the stage returning speaker and the drum kit microphone and whistling, but it is not good for the song and dance program because there is The actor's voice is very light. At this time, because the threshold level of the noise gate is not reached, the noise door will not be turned on, which will cause the scene to "disappear".
5. Compressor: Its working principle is that when the signal exceeds the set level value, the compressor begins to proportionally compress the signal to prevent the signal from continuing to expand to eliminate the whistle. This method can be used on the stage. The performance of the song and dance program, but the beginning of the whistle that did not reach the set level can not do anything.
6. Graphic equalizer: Its working principle is to attenuate or cut off some frequency points of howling to achieve the purpose of preventing howling, but its disadvantage is that the frequency setting is fixed and the frequency of howling occurs. The point is not fixed, it may appear in the first 3/4 or 1/2 or the last 3/4 of the two frequencies...so sometimes it is necessary to attenuate the two adjacent frequencies, then the icon The bandwidth of the equalizer is relatively large. After attenuating or cutting off some frequency points, the frequency collapses and is distorted. Therefore, the graphic equalizer is only suitable for some occasions where the requirements for sound amplification are not high.
7. Parametric equalizer: It works by sweeping the sweeper to the frequency at which the howling occurs, and adjusting the bandwidth of the point, then attenuating or cutting the point to achieve both whistling and useful The signal is not attenuated or cut off, so the parametric equalizer is suitable for various occasions.
These are some of my experience in eliminating whistling. Of course, I have to decide according to the actual situation, including testing. I suggest not to use the dedicated test microphone for the whistle point test, but to test with the microphone used in the field, because the actor is It’s impossible to test the microphone to sing,
In addition, the way of connection, etc., also needs to be practiced. The method I usually use is: the parametric equalizer + compressor is connected to the breakpoint of the microphone input path (one set per microphone ), the drum path + noise gate, Of course, the equipment needed to do so has a lot of capital investment. You can choose to use the equipment and methods according to your specific situation (maybe there is a better way).
The problem of easy whistling on the chest (collar clip) is related to the directionality of the chest and the pickup level. Generally, the chest has a wide directionality (omnidirectional or fan-shaped) and the chest. When used, it is usually clipped on the clothes on the chest or on the collar. The actor's mouth is far away, so the output level of the chest and the input level of the mixer are relatively large. Therefore, the chest is whistling. The possibility is relatively large. If this happens, the level of the above two places can be slightly reduced, and the performance of the performance can be ensured without whistling. In addition, the directionality of the chest mentioned above is pointed. Some chests are used for conferences and teaching. Its gimmicks are usually small in the electret. This kind of chest is never used for stage performance. The vocals are distorted and the most audible. Called, and the chest for the stage performance is capacitive or moving, without distortion or so easy to whistle. When using a microphone for live sound amplification, there will be a microphone howling problem (the line signal positive feedback causes the self-excited howling to not be discussed this time). It is popular to say that this is when the sound signal is sent out from the speaker and then input again from the microphone. After the amplification system, it is amplified again to form a signal superposition, which produces positive feedback and whistle. The sound workers have been trying to solve this problem in various ways and equipment, but it is not very ideal, according to my own experience. There are several ways to summarize, you can choose to try:
1. Feedback suppressor: Its working principle is to suppress the occurrence of howling by suppressing the occurrence of several or more than a few frequency points exceeding the preset level value in the signal. Fixed microphone placement and conference amplification still have some effect, but the effect on the stage performance is not good or even ruin the performance, because the actors are different places in the stage performances, Frequency tracking is very difficult. Secondly, when the actors are singing (especially those rock singers), the dynamics are very large. This will make the level values ​​of many frequency points not overloaded by howling. At this time, the feedback suppressor will mistakenly think that There was a howling and the suppression of these frequencies caused the sound pressure collapse of the performance and the effect of normal performance.
2. Frequency shifter: It works by shifting the frequency of the microphone signal up or down by several or dozens of frequency points to achieve no positive feedback. This method is also only suitable for conference amplification. Use it, because during the performance, the effect of the frequency change produced by the frequency shifter will be very funny, which will make everyone unable to find the north.
3. Automatic mixing console: Its working principle is to use the automatic delay noise gate to open/break the microphone with signal input and no signal input to achieve the purpose of eliminating howling. This method is very suitable for use in microphones. Using a large number of conference venues, language programs can also be used during stage performances, but they are not effective for song and dance programs (see the Noise Gate for reasons).
4. Noise Gate: Its working principle is to use the threshold level to turn on/off the microphone signal to eliminate the whistle. This method is generally used for the pickup of the drum (using the drum source to pick up the sound). Not in this column), only when the drum is hit, the microphone will be turned on, preventing the positive feedback between the stage returning speaker and the drum kit microphone and whistling, but it is not good for the song and dance program because there is The actor's voice is very light. At this time, because the threshold level of the noise gate is not reached, the noise door will not be turned on, which will cause the scene to "disappear".
5. Compressor: Its working principle is that when the signal exceeds the set level value, the compressor begins to proportionally compress the signal to prevent the signal from continuing to expand to eliminate the whistle. This method can be used on the stage. The performance of the song and dance program, but the beginning of the whistle that did not reach the set level can not do anything.
6. Graphic equalizer: Its working principle is to attenuate or cut off some frequency points of howling to achieve the purpose of preventing howling, but its disadvantage is that the frequency setting is fixed and the frequency of howling occurs. The point is not fixed, it may appear in the first 3/4 or 1/2 or the last 3/4 of the two frequencies...so sometimes it is necessary to attenuate the two adjacent frequencies, then the icon The bandwidth of the equalizer is relatively large. After attenuating or cutting off some frequency points, the frequency collapses and is distorted. Therefore, the graphic equalizer is only suitable for some occasions where the requirements for sound amplification are not high.
7. Parametric equalizer: It works by sweeping the sweeper to the frequency at which the howling occurs, and adjusting the bandwidth of the point, then attenuating or cutting the point to achieve both whistling and useful The signal is not attenuated or cut off, so the parametric equalizer is suitable for various occasions.
These are some of my experience in eliminating whistling. Of course, I have to decide according to the actual situation, including testing. I suggest not to use the dedicated test microphone for the whistle point test, but to test with the microphone used in the field, because the actor is It’s impossible to test the microphone to sing,
In addition, the way of connection, etc., also needs to be practiced. The method I usually use is: the parametric equalizer + compressor is connected to the breakpoint of the microphone input path (one set per microphone ), the drum path + noise gate, Of course, the equipment needed to do so has a lot of capital investment. You can choose to use the equipment and methods according to your specific situation (maybe there is a better way).
The problem of easy whistling on the chest (collar clip) is related to the directionality of the chest and the pickup level. Generally, the chest has a wide directionality (omnidirectional or fan-shaped) and the chest. When used, it is usually clipped on the clothes on the chest or on the collar. The actor's mouth is far away, so the output level of the chest and the input level of the mixer are relatively large. Therefore, the chest is whistling. The possibility is relatively large. If this happens, the level of the above two places can be slightly reduced, and the performance of the performance can be ensured without whistling. In addition, the directionality of the chest mentioned above is pointed. Some chests are used for conferences and teaching. Its gimmicks are usually small in the electret. This kind of chest is never used for stage performance. The vocals are distorted and the most audible. Called, and the chest for the stage performance is capacitive or moving, without distortion or so easy to whistle.
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