Audiology

Audiology encompasses the science of hearing, balance and associated disorders, integrating principles from physics, physiology, genetics and clinical practice. It interrogates how sound waves propagate through the environment, are transformed into mechanical vibrations in the middle ear, and are converted to neural signals by cochlear hair cells. These signals travel along auditory pathways to yield perceptions of loudness, pitch and spatial location. Diagnostic tools—pure-tone and speech audiometry, tympanometry, otoacoustic emissions and auditory-brainstem responses—allow early detection of peripheral and central dysfunction. Recent advances in imaging, molecular genetics and machine-learning models enable more precise characterisation of synaptic and neural pathologies, paving the way for targeted interventions including pharmacological agents, gene therapies and neural prostheses. Research in audiology spans cochlear implantation, synaptic regeneration, noise- and age-related hearing loss, and the neural basis of complex sound processing, with the ultimate aim of restoring communication and quality of life.

Research from Nature Portfolio

Single-cell long-read sequencing in the cochlea uncovered a previously unannotated short isoform of otoferlin that preserves basic auditory thresholds yet alters sustained exocytosis and membrane retrieval, demonstrating how transcript diversity fine-tunes synaptic performance. Machine-learning models optimised with simulated auditory-nerve inputs have shown that precise phase-locking—sub-millisecond synchronisation of spikes to sound—underpins human-level localisation and speech-in-noise perception, with different temporal precisions required by task demands. Magnetoencephalographic studies have also revealed a robust cortical component in the frequency-following response at the stimulus fundamental frequency, prompting a reassessment of this measure as purely subcortical and influencing our understanding of plasticity and pathology in sound processing.

Audiology publication trend

The graph below shows the total number of articles in audiology across all publications each year (not limited to Nature Index journals).

Technical terms

Audiology: The discipline addressing the physiology, diagnosis and treatment of hearing and balance disorders.

Cochlear synaptopathy: Degeneration of ribbon-type synapses between inner hair cells and auditory nerve fibres, often undetected by threshold tests.

Phase locking: Synchronisation of auditory-nerve firing to the phase of an acoustic waveform, critical for encoding fine temporal structure.

Frequency-following response (FFR): An evoked potential reflecting sustained neural activity at the periodicity of a sound stimulus.

Ribbon synapse: A specialized organelle in hair cells that tethers vesicles for rapid and sustained neurotransmitter release.

Neurotrophin-3 (NT-3): A growth factor shown to promote regeneration of cochlear synapses and recovery of auditory brainstem responses.

References

1. Cochlear transcript diversity and its role in auditory functions implied by an otoferlin short isoform. Nature Communications (2023).
2. Models optimized for real-world tasks reveal the task-dependent necessity of precise temporal coding in hearing. Nature Communications (2024).
3. Cortical contributions to the auditory frequency-following response revealed by MEG. Nature Communications (2016).
4. Single-unit data for sensory neuroscience: Responses from the auditory nerve of young-adult and aging gerbils. Scientific Data (2024).
5. The search for noise-induced cochlear synaptopathy in humans: Mission impossible?. Hearing Research (2019).
6. Toward a Differential Diagnosis of Hidden Hearing Loss in Humans. PLOS ONE (2016).
7. Round-window delivery of neurotrophin 3 regenerates cochlear synapses after acoustic overexposure. Scientific Reports (2016).
8. New treatment options for hearing loss. Nature Reviews Drug Discovery (2015).
9. General Audiology.