In general, there are no norms, there is not much soundproofing, but you will hear a passing train and do not replenish the statistics of "idiots"))) the sound is the most common, until I used the JBL equalizer, since this is enough for now, in short, I checked it in the office with a comfortable volume - a colleague sitting at the next table does not hear me (music) took just for this purpose. I checked the headset in the office - it will work
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