Audio Editing Level 6

Practice Test

Level 5 Page

Work Sheet

Audio Notes

Phase Problem

In short, the phase problem is cause when multiple microphone record an inverted waveform.

Playing a waveform over another copy of the same waveform, but, inverted, results in no sound being produce.

This is the technology used in Noise Cancellation.

The Nyquist–Shannon Sampling Theorem

In short, this theorem describes why we need to record at double the rate of our hearing range.

Over 40khz when we can only hear up to 20khz.



A mismatch in electrical impedance creates either low volume or low quality, depending on the sources used.