Auditory mechanics in the grig (Cyphoderris monstrosa): tympanal travelling waves and frequency discrimination as a precursor to inner ear tonotopy

Article Biology

Auditory mechanics in the grig (Cyphoderris monstrosa): tympanal travelling waves and frequency discrimination as a precursor to inner ear tonotopy

Charlie Woodrow et al.

Summary: This study examines the tonotopy of the tympana in the ensiferan orthopteran species Cyphoderris monstrosa. Using laser Doppler vibrometry, the researchers found that higher frequencies are received more distally in the tympana. This tonotopic mechanism is crucial in understanding the evolutionary history of ensiferan hearing.

PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES (2022)

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Article Multidisciplinary Sciences

A narrow ear canal reduces sound velocity to create additional acoustic inputs in a microscale insect ear

Daniel Veitch et al.

Summary: Katydids have unique ears in their forelegs with external and internal sound channels that differ in velocity, which is primarily influenced by the narrowing radius of the ear canal. Additionally, excess CO2 in the ear canal further reduces sound velocity. The bifurcation of the ear canal at the tympanal level creates multiple internal sound paths, resulting in different sound velocities for each tympanic membrane.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

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Article Entomology

The tracheal system in the stick insect prothorax and prothoracic legs: Homologies to Orthoptera and relations to mechanosensory functions

Johannes Strauss

Summary: The study focused on the investigation of tracheae in the prothorax and foreleg of three species of stick insects. The tracheae originate from the mesothoracic spiracle and enter the foreleg, fusing at the femur-tibia joint before splitting again in the proximal tibia. The tracheal system in stick insects is homologous to those in Tettigoniidae (bushcrickets) and shows characteristics indicating a respiratory function.

ARTHROPOD STRUCTURE & DEVELOPMENT (2021)

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Article Multidisciplinary Sciences

Tuned vibration modes in a miniature hearing organ: Insights from the bushcricket

Anna Vavakou et al.

Summary: Bushcrickets rely on a limited number of sensory units in their forelegs to sense sound, with vibration in the tiny hearing organ driving frequency tuning. Research has uncovered novel nanovibration modes within the bushcricket's hearing organ, suggesting a complex mechanism for achieving frequency separation with limited sensory cells.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

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Review Ecology

Bridging the Gap Between Mammal and Insect Ears - A Comparative and Evolutionary View of Sound-Reception

Ben Warren et al.

Summary: Insects and mammals have evolved ears in different ways, but their hearing organs are constrained by common biophysical principles. The comparative knowledge of hearing across animal phyla provides crucial insight into fundamental processes of auditory transduction.

FRONTIERS IN ECOLOGY AND EVOLUTION (2021)

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Article Computer Science, Interdisciplinary Applications