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Auditory sensitivity of the albino rat
Journal of Comparative and Physiological Psychology
|August 1, 1977
Summary
Albino rats show a broad hearing range from 250 Hz to 80 kHz. Their auditory sensitivity is typical for mammals, with no specialized tuning in the 30-40 kHz region.
Area of Science:
- Auditory Neuroscience
- Mammalian Physiology
- Animal Behavior
Background:
- Understanding the auditory capabilities of common laboratory animals like Sprague-Dawley albino rats is crucial for interpreting behavioral and physiological research.
- Previous studies suggested specialized auditory tuning in rats, necessitating further investigation.
Purpose of the Study:
- To precisely determine the auditory sensitivity range and frequency thresholds of Sprague-Dawley albino rats.
- To compare the audiogram of this rat strain with existing literature and general mammalian auditory characteristics.
Main Methods:
- Utilized the conditioned suppression technique to assess auditory responses.
- Tested three Sprague-Dawley albino rats across a wide range of sound frequencies.
- Measured auditory sensitivity at a consistent sound pressure level (SPL).
Main Results:
- Determined a hearing range from 250 Hz to 80 kHz at 70 dB (SPL).
- Identified peak auditory sensitivity around 8 kHz, with significant sensitivity also noted at 38 kHz.
- Observed no evidence of highly specialized tuning in the 30-40 kHz frequency region, contrasting with some prior data.
Conclusions:
- The Sprague-Dawley albino rat exhibits a broad hearing spectrum, typical for mammals of similar size.
- The audiogram closely approximates the mammalian mean, indicating general auditory function rather than unique specialization in higher frequencies.