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VU And PPM Audio Metering
https://sound-au.com/project55.htm
VU: A VU meter is designed to have a relatively slow response. It is driven from a full-wave averaging circuit defined to reach 99% full-scale deflection in 300ms and overshoot not less than 1% and not more than 1.5%. Since a VU meter is optimised for perceived loudness it is not a good indicator of peak (transient) performance.
VU And PPM Audio Metering - radanpro.com
http://www.radanpro.com/Radan2400/MiscAudio/VU%20And%20PPM%20Audio%20Metering.htm
VU (Volume Unit) meters are still the mainstay of audio metering systems. The Peak Programme Meter (PPM) was originally developed by the BBC to overcome the shortcomings of the VU meter, which is notoriously bad at showing the peak signal level.
VU and PPM Audio Meters – An Elementary Explanation – MCC ...
https://www.memphiscommunications.net/2015/08/13/vu-and-ppm-audio-meters-an-elementary-explanation/
A VU meter and PPM also have different ballistics (acceleration/deceleration rates). If a 1kHz steady state tone is fed into a VU meter, it takes 300 milliseconds (0.300 seconds) for the meter to stabilize. However, the PPM stabilizes within 10 milliseconds (0.010 seconds). As the VU meter displays an average volume of the audio signal, it must “sample” …
Q. What’s the difference between PPM and VU meters?
https://www.soundonsound.com/sound-advice/q-whats-difference-between-ppm-and-vu-meters
In general, then, the SVI or VU meter tends to show the average signal voltage, and gives a reasonable indication of perceived loudness. The Peak Programme Meter or PPM is a much more elaborate design and pre-dates the VU, as its development started in 1932, with the meter we know today appearing in 1938.
Is there a difference between a VU and a PPM audio meter?
https://service.shure.com/s/article/is-there-a-difference-between-a-vu-and-a-ppm-audio-meter?language=en_US
Meters which monitor audio levels are typically one of two varieties: VU (Volume Unit) or PPM (Peak Program Meters). Though both perform the same function, they accomplish the function in very different manners. A VU meter displays the average volume level of an audio signal. A PPM displays the peak volume level of an audio signal.
Everything You Need to Know About Audio Metering But …
https://sonicscoop.com/2018/03/29/everything-need-know-audio-meteringand/
VU Meters (originally called the SVI for Standard Volume Indicator) became standardized by the Acoustical Society of America in 1942. Since the design of VU is fairly simple they were cheap and easy to implement in professional as well as consumer audio equipment. Typical VU meters usually measure only the upper 23 db of the signal.
Loudness Metering Explained - Waves Audio
https://www.waves.com/loudness-metering-explained
PPM (Peak Program Meter): A slightly more advanced version of the VU meter, PPMs are better at showing instantaneous transient activity – but since they have no reference level, they are unable to provide accurate loudness monitoring. In addition, in contrast to VU meters, which have fairly equal attack and release times, PPM meters have a very slow release …
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