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Related Concept Videos

Perception of Sound Waves01:01

Perception of Sound Waves

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

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.
To assess respiratory depth, observe the degree of chest excursion or movement:
Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...
Intensity and Pressure of Sound Waves01:05

Intensity and Pressure of Sound Waves

The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive and...

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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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Acoustic analysis of voice using WPCVox: a comparative study with Multi Dimensional Voice Program.

Juan Ignacio Godino-Llorente1, Víctor Osma-Ruiz, Nicolás Sáenz-Lechón

  • 1Department of Circuits & Systems Engineering, Universidad Politécnica de Madrid, EUIT Telecomunicación, Ctra. Valencia km. 7, Campus Politécnico, 28031 Madrid, Spain. igodino@ics.upm.es

European Archives of Oto-Rhino-Laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
|October 9, 2007
PubMed
Summary

This study compares the Multi Dimensional Voice Program (MDVP) and WPCVox for voice analysis. WPCVox offers reliable acoustic measurements comparable to MDVP for distinguishing healthy and pathological voices.

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Area of Science:

  • Speech and Hearing Sciences
  • Biomedical Engineering
  • Acoustics

Background:

  • Accurate acoustic analysis of voice is crucial for diagnosing voice disorders.
  • The Multi Dimensional Voice Program (MDVP) is a widely used tool for voice parameter extraction.
  • Novel tools are needed to enhance voice analysis capabilities and data interoperability.

Purpose of the Study:

  • To compare the parametric extraction and acoustic analysis results of the established Multi Dimensional Voice Program (MDVP) with the novel WPCVox software.
  • To identify similarities and differences in voice parameters obtained from both systems.
  • To assess the utility of WPCVox for characterizing normal and pathological voices.

Main Methods:

  • Direct comparison of voice parameters extracted by MDVP and WPCVox using healthy Spanish-speaking adult voices.
  • Validation of WPCVox using a database of 200 speakers (53 normal, 173 pathological) with voice disorders.
  • Statistical analysis to evaluate the reliability and discriminatory power of WPCVox measurements.

Main Results:

  • WPCVox generates highly reliable voice measurements.
  • Measurements obtained with WPCVox show strong similarity to those from MDVP.
  • WPCVox demonstrates comparable capabilities to MDVP in discriminating between normal and pathological voices.

Conclusions:

  • WPCVox is a reliable tool for acoustic voice analysis.
  • WPCVox facilitates data transfer and comparison with existing MDVP measurements.
  • WPCVox shows significant potential for clinical application in voice disorder assessment.