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in this response characteristic, flattening out those peaks with an equalizer can signifi- cantly improve the feedback margin. A spectrum analyzer connected to the output of your mic processor will help detect the frequency of those peaks.
♦♦ If necessary, soften acoustic room reflections by adding curtains or wall treatments.
The discussion above is intended to help in those situations where open speakers are a require- ment. Whenever possible, of course, it is best to use headphones to listen to the caller audio. We have found the best scheme is to have the phone monitor speaker mute when the mic is turned on. If your mix minus has provided a means for the mic signal to be active even when the mic channel is turned off, the system can be used like a speaker phone when the taking calls off air. When the call is on the air the speaker mutes, however the talent will generally be wearing headphones when on mic, in any case.
