Squelch: How to get rid of the Wireless Microphone Interference


There are many goodies for using cordless microphones. Nevertheless, using cordless technology implies that you are likely to face new challenges and differences in performance. For instance, you will encounter interference issues. If such occurs, listen to what is coming out through such a channel. If it is the worst sound you’ve ever experienced, then it is an issue you can squelch. Moreover, to know more about this, read this article up to the end.

Table of Contents

What is Squelch?

According to Cambridge Dictionary from the Cambridge University Press, squelch means to suppress completely. In the world of technology, it means to stop or suppress a sound. For instance, you should not give the sound even a little volume in your room speakers. Additionally, cordless receivers can squelch sound also.

Therefore, a digital squelch circuit acts as a speech noise gate. The gate remains closed when the radio frequency signal level goes below a given amount. Moreover, it blocks any electrical signal to the mixer. Besides, if the signal strength increases, it is allowed to pass along. So, at this position, the tone squelches circuit keeps the presence of noise improved from transmitting to the channel.

But what of interference? Is there a way to suppress it? 

Interference makes the Squelch Circuit quite complicated. Interrupting signals can induce the receiver to unmute the voice output, mainly if the cordless transmitter is switched off. The best way to solve this issue is to make the squelch control changeable. You can usually find a squelch setting that cancels the transmute when a high transmitter signal flows.  Nevertheless, this may not work for a weak interference signal. Unfortunately, high squelch settings can also reduce the highest range of the cordless device. It is because the transmitter must be relatively close to providing the required strong signal to the device.

Radio receiver

Squelch Adjustment

There will be a small knob labeled “Squelch” on the back of the analog wireless microphone. That leads to a question: how to set the squelch? Below are steps to follow.

1: Firstly, switch off the transmitter power to reduce the signal.

2: Secondly, switch on all related devices in nearby areas to get the worst of all signal conditions.

3: Thirdly, adjust the volume at the receiver to the minor point. Adjusting the volume helps reduce continuous noise to the system.

4: Additionally, switch on the radio receiver power.

5: Afterwards, check the audio and radio frequency signals on the carrier squelch receiver.

6: For instance, if the indicators show no signal, leave the adjustable squelch setting as it is.

7: If the signals show an intermittent or steady signal received condition, adjust the squelch control until it shows no transmission signal. You can achieve this by increasing the squelch until noise reduces ultimately. To be precise, change the squelch slowly above this level to realize a threshold point.

8: Nevertheless, if you cannot achieve a zero signal state after setting your squelches high, you can as well do away with the unwanted signal. Alternatively, it is essential to choose an alternative working frequency.

9: Switch on the transmitter power.

10: Finally, ensure that there is an indication on the receiver of a signal flow. Moreover, this should happen when the transmitter is at a standard working distance.




So, sound interference is usually an irritation to any performer or DJ. Besides, with keen consideration and planning, one can avoid such altogether. Therefore, ensure you buy a high-quality cordless microphone to prevent such disappointments. Also, you can follow the above steps to correct any interference. Finally, visit us for more help and high-quality cable assemblies.