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This article is from the MPEG FAQ, by Frank Gadegast phade@cs.tu-berlin.de with numerous contributions by others.

53 For some applications, a very short delay is of critical importance: e.g. in a feedback link, a reporter can only talk intelligibly if the overall delay is below around 10 ms. Here, do I have to forget about MPEG audio at all? (MPEG Audio Layer-3 Applications)

Not necessarily. In this application, broadcasters may use "N-1" switches
in the studio to overcome this problem - or they may use equipment with
appropriate echo-cancellers.
But with many applications, these delay figures are small enough to
present no extra problem. At least, if one can accept a Layer-2 delay, one
can most likely also accept the higher Layer-3 delay.

 

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