Spectrograms are created from which of the following?

Spectrograms are graphical representations of the frequency spectrum of sounds as they vary with time. They are created using sound spectrographs, which are specialized tools or software that analyze audio signals and convert them into a visual format. This process involves capturing various frequency components of a sound wave over time and displaying them in a way that allows researchers and clinicians to visualize characteristics such as pitch, loudness, and speech patterns.

While visual aids may include spectrograms among other types of visual information, they are not the source of spectrograms themselves. Acoustic terminals, on the other hand, do not directly contribute to the creation of spectrograms. Sounds produced by speakers can indeed be analyzed using a sound spectrograph, but they are not what the spectrogram is created from directly; rather, the spectrogram represents the analysis of those sounds. Thus, sound spectrographs are the correct basis for the creation of spectrograms.