Automatic volume limiter

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Automatic volume limiter (AVL), or sometimes automatic volume limiter system (AVLS) is an option that limits the maximum volume level and is enabled through software or hardware in music players such as, cassette players,[1] MP3 players, CD players or other devices used with headphones such as the Sony PSP. The aim of this feature is to stop the headphones drowning out all other noise, and to limit the noise from the headphones being heard by other people.[2] It can also prevent listeners from damaging their hearing. This volume limit can be set by the manufacturer or customized by the user.

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