howl

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howl

Electronics an unwanted prolonged high-pitched sound produced by a sound-producing system as a result of feedback

howl

[hau̇l]
(engineering acoustics)
Undesirable prolonged sound produced by a radio receiver or audio-frequency amplifier system because of either electric or acoustic feedback.
References in periodicals archive ?
``The Tories want to keep the current seating arrangements because they are closest to the lectern and can howl down speakers with their Hooray Henry catcalls of the kind heard in Westminster.''
The pundits will always howl down those who say, quite correctly, that fluorine is a poison, relying on research about safety levels and all the rest of the clever science with which they hope to blind us.
Doubtless the judges and Labour's coalition partners in the Lib Dems will howl down the proposal but they shouldn't be allowed to.