Unsurprisingly, the modern VU meter can trace its roots back to the ... the early telephone pioneers’ efforts at sound level metering were based on line losses over a “standard mile” of ...

One of the coolest things any sound system can have is some kind of musical visualization. Thumping level meters that pump ... with the sound level having to exceed the voltage drop of successive ...

SPL may be measured with a SOUND LEVEL METER weighted according to a specific frequency response pattern and termed SOUND LEVEL. The electroacoustic equivalent to SPL is measured with a VU METER.