Thread: jargon
View Single Post
  #10   Report Post  
Posted to sci.electronics.basics,rec.audio.tech
Don Pearce[_3_] Don Pearce[_3_] is offline
external usenet poster
 
Posts: 2,417
Default jargon

On Sat, 19 Nov 2011 20:22:43 +1100, "Trevor" wrote:


"Don Pearce" wrote in message
...
On Fri, 18 Nov 2011 13:51:37 -0800 (PST), RichD
wrote:

What's the difference between reverb, echo, and feedback?


Echo is a single reflection of a sound - the kind you hear when you
shout "Hello" near a cliff.


Multiple reflections are also common in such instances.


No they are not. One cliff, one echo. No choice.


Feedback is a situation you only get when you have an amplifier and a
speaker. The sound arriving from the speaker is a little louder than
the one that originally hit the microphone, so that comes out of the
speaker a little louder still. This loop will build until the system
howls.


That would be *acoustic feedback* only, There are MANY other types of
course.

In the context of the question it would simply be confusing to discuss
- or even mention - other kinds.

You cure it by turning down the amplifier so the sound from the
speaker is always a little softer than the original when it hits the
microphone.


Or any other method that reduces the loop gain at the feedback frequency,
notch filtering being a common example.


Again, given the question, no need to complicate the answer.

d