Spectrogram

What is an audio spectrogram?   An audio spectrogram is a visual representation of sound. Spectrogram, in general, is a time-varying spectral representation which shows the variation of spectral density of a signal with respect to time. Spectrograms (or...

Spectrum Analyzer

What is a Spectrum Analyzer   The spectrum analyzer is a specialized type of a sound level meter. Consequently, it allows the engineer to examine the amplitude versus the frequency spectrum of a sound. They use multiple sets of filter networks and vertical colums...

VU Metering

What is a VU meter?   The VU meter shows an averaged signal level and gives an impression of perceived loudness. The origins of the mentioned VU meter go back to 1939. Its original name was SVI or Standard Volume Indicator. A collaborative project by CBS, NBC and...

Stereo Separation Metering

Goniometer   The Goniometer presents the stereo separation signal measurement in the audio metering world. A Goniometer plots the signal on a two-dimensional area so that the correlation between the two audio channels becomes visually apparent. The goniometer...

LUFS Metering

Back in the days of analog recording, meters actually displayed electrical level as a representation of audio level. Today’s digital technology enables alternative types of metering. For example, unlike the human ear, which has different sensitivities to sound at...