Ways of Controlling Reverberation Time

A reverberation is basically when a sound gets reflected from a surface causing many more reflections of the sound and then gradually decays as it gets absorbed by other surfaces around it. To simply put, it is how you hear an echo. A reverberation can interfere with the quality of sound for the end-user, which is why people look for ways of controlling reverberation time. Having less reverberation in your audio helps in hearing the sound clearly, thereby enriching the experience.

The reason why reverberation control is needed is to improve the clarity of speech of a person so that it is comprehended by the listener the way it was intended to. It is important for good acoustic conditions for the end-user, which is the listener. The reverberation time can be defined as the time it takes for the sound pressure level in a space to decay by 60 dB after the sound source has stopped. It is generally measured in octave or third-octave bands. For a medium-sized space used for delivering both speech and music, the ideal reverberation time is 2 seconds. For a classroom, the ideal reverberation time is less than a second.

sound-absorbing materials

Here are some ways of controlling the reverberation time:

  • Reduce the volume of the source

Sometimes the solution to controlling the reverberation is as simple as keeping the volume low. Having any other electronics in the room that make any sound may interfere with your sound. If you have noisy electronics such as a fan or AC in the room you are recording or speaking in, turning it off might help with how your sound is perceived.

  • Add sound-absorbing materials

You can control sound reflections in a room by adding ceiling tiles, sound absorption panels or other materials. It reduces the echo in a room, which enables the end-user to hear what you are saying clearly, without any external distractions. Adding carpets and hanging curtains in a room also reduce the ability of the sound to bounce off surfaces.

  • Increase the distance

If you have noisy electronics in the room or near the room, try to place it away from the audience, or host the event in a room that is away from things like generators or vents, so that the external noise created by these is reduced and the audience can hear you more than any other noise.

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