University of Pittsburgh Voice Center
Voice Analysis Lab
The voice care team use the lab for quantification of the voice
signal with respect to pitch, loudness, quality, as well as measurement
of the acoustic parameters and breathing dynamics.
(1) Sound Spectrograph:
The Sound spectrograph produces a "print" which shows fundamental
frequency, harmonics and intensity of the voice. This is used to identify
subtle, but crucial changes in voice quality that can then be treated.
The spectrogram identifies the presence of noise in the voice, such as
tremor, pitch breaks and abrupt starts.
(2) Aero-Dynamic Analysis:
This technology measures laryngeal airflow, air pressure and intensity
during voice production. This allows for the analysis of breath use,
laryngeal control and vocal efficiency during phonation. Aerodynamic
assessment reflects the physiology of vocal fold opening and closing.
(3) Voice Range Profile:
Measures the high and low frequencies and intensities of the singing
voice. This allows one to identify and quantify areas of the singer's
range that are problematic. The voice range profile can then be used to
monitor improvement following treatment of the singer's ability to
control vocal intensity throughout his/her vocal range.
(4) Acoustic Analysis:
Measures that frequency of phonation as well as the variation of the
voice. The variation of the voice signal associated with opening and
closing of the vocal folds is related to the perception of hoarseness
harshness and breathiness.
(5) Feedback:
All the systems used to assess vocal function must also be used to
monitor therapy and provide an "acoustic mirror" that is, feedback to the
patient as he/she talks and sings.