spectrogram
/ˈspɛktrəˌɡræm/
noun
- A visual representation of the spectrum of frequencies in a sound or other signal as they vary with time.
- Musicians sometimes look at a spectrogram to see the harmonics in a note.
- The linguist used a spectrogram to analyze the different sounds in the spoken word.
- A spectrogram of a bird's song shows how the pitch changes over time.