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What Is Gain On a Microphone?

What is Gain on a Microphone by Geeksper

When you say the word microphone, most people assume that you are talking about recording sounds. But microphones do not just record sounds, some of them can also amplify sounds.

Gain on a microphone is when the device amplifies the sound that it picks up from its surrounding environment. In the recording, the Microphone Gain is the amount of power required to boost a microphone’s signal.

In this blog post, I will be discussing the importance of Gain on a microphone, how to increase the Gain on a microphone, and What is Gain does on a microphone.

What is the Gain of a Microphone?

Microphone Gain is a principle within amplifiers and other telecommunications devices. In such equipment, the Gain measures how much larger an output voltage or current is than an input voltage or current. In simpler terms, the Gain is the ratio between output and input voltage or current.

How Does Gain Work?

Gain within telecommunications equipment can be thought of as a multiplication factor between the input and output, which can be expressed as the ratio of (output/input)^(n), where n is an exponent.

Digital cameras translate photon data into digital data. During this process, electrons coming from the sensor run through a pre-amplifier. Gain is the amplification applied to the signal by the image sensor. As a result, not only the signal but also the noise is boosted. 

That is why both low-light situations and high levels of amplification in analog circuits, like older tube amplifiers, are characterized by higher amounts of noise.

Check Out: When Was the Microphone Invented, and by Whom?

What Does Gain Do On a Microphone?

The Gain level on a microphone is determined by the strength of an incoming signal and can be increased or decreased depending on what you want to do with it.

Microphones have long been used to amplify sound so that humans could hear better. Still, today this function has expanded as new technologies of microphones to pick up other types of sound waves beyond human hearing.

For example:

  • A medical ultrasound machine uses a high voltage amplifier to increase the strength of an ultrasonic signal so that it is easily detectable.
  • The built-in microphone on a cell phone can pick up high-frequency waves like radio signals.
  • Sometimes the Gain is turned down to pick up a faint sound, for example, when recording the sounds of stars and planets.
  • When it comes to recording, the Gain is known as sensitivity and is measured in decibels.

Modern researchers are also using sound recording equipment to amplify infrasonic signals which occur at frequencies below what humans can hear like the rumblings of earthquakes.

Setting the gain level control sets the level of distortion in your tone, regardless of how loud the final volume is set. That means that your gain setting determines how clean or dirty your sound is, regardless of the master volume control setting.

Can We Increase Or Decrease a Gain?

Yes, It is possible to increase or decrease the Gain on a microphone. The Gain is the amplification of an audio signal coming into a microphone. It can be done in the traditional way of turning the Gain up or down, but sometimes there are more advanced methods.

How Do You Increase the Gain on a Microphone?

There are several ways to increase the Gain on a microphone. First, you can use an external power source. By using an external power source, you can boost your signal and increase your sound quality.

This method is recommended for more advanced users because it requires knowledge of how to handle electronic devices.

An additional way to increase your Gain is to adjust the gain setting on your device. It requires knowledge of frequencies and how they interact with your device.

To adjust the Gain, you will need to increase both the high and low frequencies. That is because a sound travels in waves, and the high and low frequencies increase a sound’s amplitude.

Finally, you can increase your Gain by lowering your output volume. It is ideal for people who are using their devices. Keeping your output volume at a lower level can save battery life without sacrificing sound quality.

How Do You Decrease the Gain on a Microphone?

It is often necessary to reduce the Gain of a microphone. For example, perhaps you want to prevent distortion, or it’s just too loud for the recorder. You can reduce the Gain of a microphone in several ways, each with its advantages and disadvantages.

The simplest way to reduce the Gain of a microphone is to decrease the microphone’s distance to the sound source. 

For example, if you are recording a folk singer with your stereo microphone and the singer is hitting the microphone with their mouth, you can decrease the Gain by moving the microphone back.

Also, you can reduce the Gain of a microphone by using the microphone’s attenuation switch, which is often labeled “attenuator” or “pad.”

This switch has two settings: 0 decibels or -10 decibels.

In most cases, the switch comes set in the 0-decibel position. However, you can decrease the Gain of the microphone by switching the switch to the -10 decibel position and then re-adjusting the microphone until you get a good recording level.

FAQs (Frequently Asked Questions)

Does Gain affect the sound quality?

Yes, it can affect the sound quality of your recording. For example, if you have too much Gain, your sound becomes distorted.

What happens if the Gain is too high?

If the Gain is too low, your recording will be very quiet. Therefore, you need to play it back at a higher volume if you use a recording device.

What is the difference between the low Gain and high gain setting?

There’s not much of a difference, but the low gain setting decreases the sensitivity of your microphone. And high gain setting increases the sensitivity of your microphone.

What is the Gain on a mic?

Gain is an increase in volume or intensity, and it’s a crucial part of audio recording.

What is the best way to reduce Gain?

The best way to reduce your Gain is by changing your distance from the object or person you’re recording.

Is gain the same as an overdrive?

Gain is the amount of distortion(signal clipping) added to the signal. Overdrive is just a form of distortion.


Understanding gain is important if you want to get the best audio quality from your recorder. By now, I hope that you understand how much a microphone can increase or decrease its gains. And also some of the ways you can adjust them, like using the microphone’s attenuation switch.

Now, you know what input gain on a microphone is and how to reduce it. If you have any questions or concerns, please leave them in the comments below. I hope this article was helpful!

Until then check out some of my other articles as well:
Easy Hacks To Improve Microphone Sound Quality
What Does a Shock Mount Do for a Mic?
How to Make Your Voice Deeper On the Mic?
How To Stop Microphone From Picking Up Keyboard Noise
Which Microphone Do They Use?