spectrogram
Noun: A visual representation or graphical display of the spectrum of frequencies in a signal as they vary with time or another variable. It is typically produced by an instrument called a spectrograph and is used to analyze the frequency content of sound, light, or other waveforms.
A spectrogram is used to visualize how the frequency spectrum of a signal changes over time. It is a fundamental tool in fields like acoustics, linguistics, music processing, and seismology. - Primary Use: To analyze and display the frequency components of a signal. - Typical Contexts: Scientific research, audio engineering, speech analysis, and diagnostic testing.
- The audio engineer examined the spectrogram to identify the specific frequencies of the interference.
- In the linguistics lab, researchers created a spectrogram of the speech sample to study vowel formants.
- The spectrogram of the bird's song revealed a complex pattern of harmonics.
- Narrowband vs. Wideband Spectrogram: Refers to the resolution of the analysis. A narrowband spectrogram provides fine frequency resolution, ideal for showing harmonic structure, while a wideband spectrogram provides fine time resolution, better for showing formant transitions in speech.
- 3D Spectrogram / Spectrograph: Sometimes used to describe a spectrogram that also represents amplitude or intensity through a color or brightness gradient, creating a three-dimensional visualization (time, frequency, and intensity).
- Spectrograph (noun): The instrument or apparatus used to produce a spectrogram.
- Spectrographic (adjective): Of or relating to a spectrogram or spectrograph (e.g., spectrographic analysis).
- Spectrography (noun): The technique or process of producing spectrograms.
- Spectral display
- Frequency-time plot
- Sonogram (specifically for sound; while often used interchangeably in acoustics, "sonogram" can also refer to medical ultrasound imaging).
(Note: These are compound terms or common collocations, not definitions of the target word itself.) - Voice spectrogram: A spectrogram specifically of a human voice. - Power spectrogram: A spectrogram that represents the power or intensity of the frequency components. - Mel spectrogram: A spectrogram where the frequency axis is warped to the mel scale, which approximates human auditory perception, commonly used in speech and music processing.
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a photographic record of a spectrum
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