Related Experiment Video
Updated: Jul 17, 2026
09:09
Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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
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.
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.
Related Concept Videos
03:38Measurement: 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.
01:28Physical 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.
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.
Breath Sounds
Breath sounds are categorized into vesicular, bronchovesicular, and bronchial.
00:58Sound Intensity
The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the emitted...
01:29Assessment 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.
To assess respiratory depth, observe the degree of chest excursion or movement:
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.
To assess respiratory depth, observe the degree of chest excursion or movement:
00:53Sound Intensity Level
Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and hence a...
01:10Units and Standards of Measurement
A physical quantity is defined either by specifying its measurement method or by stating how it is calculated from other measurements. For example, consider a metallic cube. We might define its mass and dimensions by specifying methods for measuring them, such as using a weighing machine and a meter scale. Then, we could define the volume by stating that it is the cube of its side, and we could calculate the density as the mass divided by the volume.
Measurements of physical quantities are...
Measurements of physical quantities are...