Feedback - Mic Echoing problems
Q: For some reason my microphone input combines with output and causes
echoing problems when using the mic.
A: This is called: FEEDBACK and it is nothing but a normal Sound phenomenon,
that Microphone manufacturers have been 'fighting' with for a long time. This
usually happens when a Mic points to a Speaker (directly or indirectly
- within the speaker radius).
Feedback is the ringing noise (often described as squealing, screeching,
etc) that is caused by a "looped signal": A signal that travels in a
continuous loop. In technical terms, feedback occurs when the gain in the
signal loop reaches "unity" (0dB gain). A microphone feeds a signal into
a sound system, which then amplifies and outputs the signal from a
speaker, which is picked up again by the microphone.
To overcome this problem:
- Do not point the Mic towards the speaker(s)
- Move the angle/axis of your Speakers so that they do not "face" the Mic
- Use a more directional microphone
- Speak closer to the mic
- Do not cover the Mic 'head' with your hand or mouth
- Turn the microphone off when not in use
- Turn down the speaker volume, so the mic doesn't pick it up
- Adjust the Input / Output level from your Windows Mixer
- Use a headset or in-the-ear monitors instead of speaker monitors
- Use an audio Mixer. They are quite inexpensive nowadays: (Behringer)
With a mixer you have more control over your sound thru Master >
Channel > Pre-amp stage Trimmers, Attenuators, EQ, etc. etc.
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