Automatic volume limiter system
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An automatic volume limiter system (AVLS) is an option that limits the maximum volume level and is enabled through software or hardware in stationary or
portable media player A portable media player (PMP) or digital audio player (DAP) is a portable consumer electronics device capable of storing and playing digital media such as audio, images, and video files. Normally they refer to small, Electric battery, batter ...
devices used with headphones such as the
Walkman is a brand of Personal stereo, portable audio players manufactured by Sony since 1979. It was originally introduced as a portable Compact Cassette, cassette player and later expanded to include a range of portable audio products. Since 2011, ...
or
Sony PSP The PlayStation Portable (PSP) is a handheld game console developed and marketed by Sony Computer Entertainment. It was first released in Japan on December 12, 2004, in North America on March 24, 2005, and in PAL regions on September 1, 2005, ...
. 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. It can also prevent listeners from damaging their hearing. This volume limit can be set by the manufacturer or customized by the user.


References

{{Sound-tech-stub Digital audio