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Related Concept Videos

Measurement: Standard Units03:38

Measurement: Standard Units

Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results.
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Physical Assessment of the Respiratory Tract IV: Auscultation

Auscultation is a crucial component of the physical assessment of the respiratory tract. It offers valuable insights into airflow through the bronchial tree and potential lung obstructions. This process involves careful listening to breath, voice, and adventitious sounds, which can reveal a wealth of information about a patient's respiratory health.
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Sound Intensity00:58

Sound Intensity

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Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
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Sound Intensity Level00:53

Sound Intensity Level

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Related Experiment Video

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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
09:09

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Published on: September 27, 2024

Standardization of acoustic measures for normal voice patterns.

Ana Clara Naufel de Felippe1, Maria Helena Marotti Martelletti Grillo, Thaís Helena Grechi

  • 1FFCLRP, USP, UNAERP, Brazil. anaedufelippe@netsite.com.br

Brazilian Journal of Otorhinolaryngology
|January 16, 2007
PubMed
Summary

This study establishes normative acoustic data for young adults, standardizing fundamental frequency (fo), jitter, shimmer, and harmonic-noise ratio (HNR). Results show significant differences between males and females, highlighting the need for program standardization.

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Area of Science:

  • Speech and Hearing Sciences
  • Acoustic Analysis
  • Voice Production

Background:

  • Normative data is crucial for accurate acoustic analysis of voice.
  • Standardized measures are needed for reliable voice assessments in young adults.

Purpose of the Study:

  • To standardize fundamental frequency (fo), jitter, shimmer, and harmonic-noise ratio (HNR) in young adults with normal voices.
  • To establish normative acoustic data for voice analysis in a young adult population.

Main Methods:

  • Acoustic analysis of sustained vowels /a/ and /é/.
  • Participants included 20 males and 20 females aged 20-45 years with no vocal complaints.
  • Data collected using the CSL-4300 Kay-Elemetrics system.

Main Results:

  • Females exhibited higher average fundamental frequency (fo) and harmonic-noise ratio (HNR) compared to males.
  • Specific normative values for fo, jitter, shimmer, and HNR were determined for both sexes.
  • Vowel /a/ and /é/ showed comparable acoustic measures within each sex.

Conclusions:

  • The established normative values differ from existing literature.
  • Standardization of acoustic analysis programs is essential for consistent results.
  • This study provides a foundation for sex-specific voice analysis in young adults.