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Related Concept Videos

The Cochlea01:13

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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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.
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The study of music provides many examples of the superposition of waves and the constructive and destructive interference that occurs. Very few examples of music being performed consist of a single source playing a single frequency for an extended period of time. A single frequency of sound for an extended period might be monotonous to the point of irritation, similar to the unwanted drone of an aircraft engine or a loud fan. Music is pleasant and exciting due to mixing the changing frequencies...
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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...
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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
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A Lightweight, Headphones-based System for Manipulating Auditory Feedback in Songbirds
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Higher-Order Musical Temporal Structure in Bird Song.

Hans T Bilger1,2, Emily Vertosick3, Andrew Vickers3

  • 1Department of Ecology and Evolutionary Biology, and Peabody Museum of Natural History, Yale University, New Haven, CT, United States.

Frontiers in Psychology
|April 19, 2021
PubMed
Summary

Humans perceive bird songs with their original temporal sequences as more musical. This study explored higher-order musical structure in avian vocalizations using a novel "music scrambling" technique.

Keywords:
aesthetic evolutionbio-musicologybird songhonest signalinglinguisticsmusicalityperceptual biassexual selection

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Area of Science:

  • Bioacoustics
  • Animal Behavior
  • Ethology

Background:

  • Bird songs exhibit complex acoustic features resembling human music, including pitch, rhythm, and melody.
  • The temporal sequencing of these elements is crucial for musicality in human music, but its role in avian vocalizations is less understood.

Purpose of the Study:

  • To investigate the perception of higher-order musical temporal structure in bird song.
  • To determine if the original temporal sequencing of avian vocal elements influences human perception of musicality.

Main Methods:

  • Recorded songs from 20 diverse avian taxa were digitally manipulated into original and randomized note/syllable sequences.
  • Human subjects evaluated the musicality of these scrambled and original song versions, unaware of species or treatment.
  • Human music recordings served as controls to ensure participant attentiveness.

Main Results:

  • Human listeners were significantly more likely to rate bird songs with their original temporal sequence as more musical compared to randomized versions.
  • Individual listener variability was observed, but the trend favored original song structures.

Conclusions:

  • The temporal organization of bird song elements plays a significant role in perceived musicality for human listeners.
  • Findings support hypotheses on the evolution of avian musicality, including honest signaling, perceptual biases, or coevolution with aesthetic preferences.