People use them to save their own hearing, not to quieten the noise at the other end.
BTW, a 4dB difference is bugger all. 10dB is half ( or double) the "loudness", depending on the direction you're going
People use them to save their own hearing, not to quieten the noise at the other end.
BTW, a 4dB difference is bugger all. 10dB is half ( or double) the "loudness", depending on the direction you're going
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