Share:
Glossary Forensics

Spectrogram

A spectrogram is a picture of sound that plots time across, frequency up and the strength of each frequency as colour.

Last reviewed:

AdSense Placeholder
Slot: header_reference_page

In more detail

It is computed with a short-time Fourier transform. Forensic analysts use it to spot edits (sudden changes in background noise), missing frequency bands that reveal low-bitrate encoding, and hidden tones or messages. See the Audio Forensics.

Try these tools

Audio Forensics

Analyze audio for edits with waveform and spectrogram views, clipping and noise-floor checks, recompression sensitivity.

See also

  • Glossary Sample rate
    The sample rate is how many times per second a digital recording measures the sound wave, in hertz.
  • Glossary Electric network frequency (ENF)
    The electric network frequency is the tiny, constantly changing variation around 50 or 60 Hz in the mains supply.
Back to Glossary
AdSense Placeholder
Slot: footer_leaderboard