The measurement or graphing of acoustic (sound) information about the voice. This analysis includes voice measures such as fundamental frequency, formant pattern and energies, decibel level (a physical measure of sound pressure level that roughly correlates to perception of loudness), signal-to-noise ratio, jitter, and shimmer.
At present it is difficult to find unique diagnostic information from any set of acoustic measures. Hence, acoustic analysis is arguably justified for now in the realm of voice research and when used as a feedback tool in the therapy room. Although this may change in the future, at present acoustic analysis is superfluous to the diagnostic process, and specifically to the integrative diagnostic model.