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Related Concept Videos

Language and Cognition01:27

Language and Cognition

321
Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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Perceiving Loudness, Pitch, and Location01:21

Perceiving Loudness, Pitch, and Location

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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...
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Auditory Perception01:17

Auditory Perception

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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...
317
Facial Feedback Hypothesis01:24

Facial Feedback Hypothesis

124
Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
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Higher Mental Functions of the Brain: Language01:10

Higher Mental Functions of the Brain: Language

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Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
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Perception of Sound Waves01:01

Perception of Sound Waves

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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...
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Related Experiment Video

Updated: Jun 3, 2025

Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception
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Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception

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Exploring Voice Acoustic Features Associated with Cognitive Status in Korean Speakers: A Preliminary Machine Learning

Jiho Lee1, Nayeon Kim1, Ji-Wan Ha2

  • 1Neopons Inc., Daegu 41260, Republic of Korea.

Diagnostics (Basel, Switzerland)
|January 8, 2025
PubMed
Summary

This study explored using speech analysis to detect cognitive impairment, finding specific voice acoustic features like DDA shimmer and stdevF0 show potential for early screening. Further research is needed to confirm these findings in diverse populations.

Keywords:
K-MMSEcognitive impairmentdeep learningpre-screeningspeech featuresspeech tasks

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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Last Updated: Jun 3, 2025

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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Area of Science:

  • Speech analysis
  • Cognitive impairment detection
  • Machine learning

Background:

  • The global dementia crisis necessitates accessible early screening methods.
  • Non-invasive techniques for cognitive health monitoring are crucial.
  • Daily health monitoring offers a platform for accessible screening.

Purpose of the Study:

  • To develop a non-invasive system for detecting cognitive impairment using speech data.
  • To enable early screening for cognitive decline through everyday health monitoring.
  • To analyze acoustic features in speech for indicators of cognitive status.

Main Methods:

  • Collected speech data from 223 Korean patients across eight tasks.
  • Classified patients based on Korean Mini-Mental State Examination scores.
  • Applied four machine learning models and analyzed voice acoustic features.

Main Results:

  • Deep Neural Network achieved the highest performance (0.737 PR AUC) for severe vs. no impairment.
  • Random Forest showed strong results (0.715 PR AUC) for combined severe + mild vs. no impairment.
  • Specific acoustic features (DDA shimmer, stdevF0) indicated potential diagnostic value.

Conclusions:

  • Certain speech acoustic features may correlate with cognitive status.
  • Demographic factors significantly impact the relationship between acoustic features and cognition.
  • Further validation in demographically matched populations is required.