ˈspectrogram
[f. spectro- + -gram.]
A photograph of a spectrum. Hence, more widely, a visual representation of a spectrum of any kind.
| 1892 Pall Mall G. 17 Feb. 7/2 The spectrograms of the star show two spectra, one above the other. 1900 Edinb. Rev. Apr. 474 There must be a suspension of judgement in the matter until spectrograms of nebular nuclei can be produced in evidence. 1939 Amer. Speech XIV. 313/2 Examination of eleven subjects singing the vowel ‘ah’ normally and after hydrogen inhalation... Illustrated with acoustic spectrograms. 1961 Brit. Birds LIV. 388 The original spectrograms have a frequency scale from 0 to 10 kilocycles per second. 1975 Nature 25 Sept. 295/1 Spectrograms obtained with a Carnegie image tube on the 2·1-m telescope at the Kitt Peak National Observatory have been used to complete the determination of radial velocities for 50 of the 52 galaxies. 1978 Hi-Fi News Sept. 175/1 None of these, however, exceeded -70dB ref. 36 V RMS across the load (shown in spectrogram fig. 2). 1981 Amer. Speech 1977 LII. 237 The degree of centralization was determined by the use of a bilogarithmic scale in measuring the spectrograms of eighty instances of /aɪ/. |