The noise cancellation feature of Trebble allows you to remove background noise from your audio. You can activate the noise cancellation feature by doing the following:

On the audio editing and transcription page, after recording or importing your audio, locate and click on the show automated actions icon from the icons above the transcription text.

Locate Noise Cancellation from the drop-down options and toggle on the ball beside it. Wait for a few moments to allow Trebble to remove background noise from your audio.