PMID: 3761225Aug 1, 1986Paper

Frequency selectivity of hearing in the green treefrog, Hyla cinerea

Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
C F Moss, A M Simmons

Abstract

Frequency selectivity of hearing was measured in the green treefrog, Hyla cinerea. A psychophysical technique based on reflex modification was used to obtain masked threshold estimates for pure tones (300-5,400 Hz) presented against two levels of broadband masking noise. A pure tone (S-1) presented 200 ms prior to a reflex-eliciting stimulus (S-2) inhibited the motor reflex response to S-2. The magnitude of this reflex modification effect varied systematically with the sound pressure level (SPL) of S-1, and threshold was defined as the SPL of S-1 at which the reflex modification effect disappeared. Masked thresholds were used to calculate critical ratios, an index of the auditory system's frequency selectivity. The frequency selectivity of the treefrog's hearing is greatest and critical ratios are lowest (22-24 dB) at about 900 and 3,000 Hz, the two spectral regions dominant in the male treefrog's species-specific advertisement call. These results suggest that the treefrog's auditory system may be specialized to reject noise at biologically-relevant frequencies. As in other vertebrates, critical ratios remain constant when background noise level is varied; however, the shape of the treefrog's critical ratio function across freq...Continue Reading

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Citations

Sep 1, 1993·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·A M SimmonsM P Mirin
Feb 1, 1993·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·A M Simmons, M Ferragamo
Feb 1, 1988·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·A M Simmons
Dec 15, 2012·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Andrea Megela Simmons
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Sep 9, 2020·The Journal of Experimental Biology·Jakob Christensen-DalsgaardMark A Bee

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