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Changes in voice quality after a Pure Tone Stimulation (PTS) Program.

Lady Catherine Cantor-Cutiva1, Pasquale Bottalico2, Juliana Codino3

  • 1Department of Communication Sciences and Disorders; The University of Iowa; Iowa City; United States.

Revista De Investigacion E Innovacion En Ciencias De La Salud : RIICS
|March 17, 2025
PubMed
Summary
This summary is machine-generated.

Pure tone stimulation (PTS) improved voice quality in individuals with and without voice disorders. Acoustic analysis revealed increased fundamental frequency and pitch strength, indicating enhanced vocal production through this auditory feedback technique.

Keywords:
VoiceVozacousticsacústicaespectrogramaestimulación con tonos purospure tone stimulationspectrogramterapia vocalvoice therapy

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Area of Science:

  • Speech and Hearing Sciences
  • Acoustic Analysis
  • Voice Disorders

Background:

  • Auditory feedback is crucial for monitoring and adjusting vocal characteristics to maintain optimal voice quality.
  • Pure tone stimulation (PTS) is an auditory technique using binaural pure tones to modify speaking fundamental frequency and vocal range.
  • This method is employed in conversational voice training and therapy.

Purpose of the Study:

  • To investigate the effects of pure tone stimulation (PTS) on voice production.
  • To characterize acoustic changes in voice following PTS application.
  • To compare the impact of PTS on speakers with and without voice disorders.

Main Methods:

  • Thirty-nine participants (28 with voice disorders, 11 with normal voices) underwent binaural PTS exercises.
  • Acoustic voice parameters (fundamental frequency, pitch strength, harmonics-to-noise ratio, smoothed cepstral peak prominence) were analyzed from sustained vowel /a/ recordings before and after PTS.
  • Voice quality was qualitatively assessed using visual analogue scale (VAS) ratings of narrowband (NB) spectrograms.

Main Results:

  • Statistically significant increases in fundamental frequency were observed post-PTS (except in normal-voiced males).
  • Pitch strength and harmonics-to-noise ratio increased across participants, irrespective of gender or voice disorder status.
  • VAS ratings indicated improved voice quality based on NB spectrogram analysis.

Conclusions:

  • Pure tone stimulation (PTS) leads to measurable voice quality improvements.
  • Acoustic and qualitative assessments confirm the efficacy of PTS in enhancing vocal production for diverse speakers.
  • PTS shows promise as a therapeutic tool for voice training and rehabilitation.