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The Cochlea

The Cochlea

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.

Auditory Perception

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...

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Related Experiment Video

Updated: Mar 18, 2026

Extracellular Multi-Unit Recording from the Olfactory Nerve of Teleosts

Extracellular Multi-Unit Recording from the Olfactory Nerve of Teleosts

Published on: October 6, 2020

Auditory sensitivity in aquatic animals.

Klaus Lucke¹, Arthur N Popper², Anthony D Hawkins³

¹Centre for Marine Science & Technology, Curtin University, GPO Box U1987, Bentley, Western Australia 6845, Australia.

The Journal of the Acoustical Society of America

|July 3, 2016

Summary

This summary is machine-generated.

Understanding marine animal hearing sensitivity is crucial for assessing noise impacts. Research must address detection, masking, behavioral responses, and cumulative effects for better conservation outcomes.

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Last Updated: Mar 18, 2026

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Area of Science:

Marine biology
Bioacoustics
Environmental acoustics

Background:

Hearing sensitivity in marine animals is a key metric for noise-induced effects.
Current research faces uncertainties in sound detection, masking, and behavioral responses.

Purpose of the Study:

To highlight critical research areas for understanding marine animal acoustic sensitivity.
To emphasize the need for research on factors influencing sound detection and response.
To explore new approaches for assessing population and ecological impacts of sound.

Main Methods:

Review of existing research on marine animal acoustics and hearing sensitivity.
Identification of key knowledge gaps and research priorities.
Proposal for interdisciplinary approaches to ecological impact assessment.

Main Results:

Significant uncertainties exist regarding marine animal sound detection and response.
Man-made noise can mask biologically important sounds.
Internal states and experience influence behavioral reactions to sound.
Long-term and cumulative effects of sound exposure require further investigation.

Conclusions:

Further research should focus on detection thresholds, masking, behavioral variability, and cumulative impacts.
Adopting novel methodologies from other disciplines can enhance ecological impact assessments for marine fauna.