Simple Explanation

An audio meter designed to measure and display the peak levels of an audio signal, rather than the average levels.

Concise Technical Definition

A type of audio meter originally developed in Europe to accurately measure peak audio signals. PPMs are used to show the highest level reached by an audio signal, as opposed to average levels measured by other types of meters, such as VU meters.

Layman-Friendly Analogy

Think of it like a speedometer in a car—it shows the highest speed (peak) the car reaches, rather than the average speed over time.

Industry Usage Summary

PPMs are commonly used in professional audio settings, such as broadcasting and recording studios, to ensure that audio signals do not exceed the maximum allowable peak level, which could lead to distortion. Unlike VU meters, which show average levels, PPMs are designed to react quickly to momentary loud sounds or spikes in audio.

Engineering Shortcut

A meter that displays the peak levels of an audio signal, used to avoid distortion.

Full Technical Explanation

The Peak Program Meter (PPM) is an audio meter used to measure and display the peak levels of an audio signal. Developed in Europe, the PPM is designed to accurately track the instantaneous peak values of a signal, making it more suitable for audio environments where high transient signals (like sudden bursts of sound) need to be monitored. The PPM differs from a VU meter, which measures average signal levels and is less responsive to brief peaks. This makes the PPM an essential tool in professional audio to ensure that audio signals do not exceed the peak level limits, preventing distortion or clipping in recording and broadcasting environments.