Two-tone suppression in the cricket, Eunemobius carolinus (Gryllidae, Nemobiinae)

The Journal of the Acoustical Society of America
Hamilton E Farris, Ronald R Hoy

Abstract

Sounds with frequencies >15 kHz elicit an acoustic startle response (ASR) in flying crickets (Eunemobius carolinus). Although frequencies <15 kHz do not elicit the ASR when presented alone, when presented with ultrasound (40 kHz), low-frequency stimuli suppress the ultrasound-induced startle. Thus, using methods similar to those in masking experiments, we used two-tone suppression to assay sensitivity to frequencies in the audio band. Startle suppression was tuned to frequencies near 5 kHz, the frequency range of male calling songs. Similar to equal loudness contours measured in humans, however, equal suppression contours were not parallel, as the equivalent rectangular bandwidth of suppression tuning changed with increases in ultrasound intensity. Temporal integration of suppressor stimuli was measured using nonsimultaneous presentations of 5-ms pulses of 6 and 40 kHz. We found that no suppression occurs when the suppressing tone is >2 ms after and >5 ms before the ultrasound stimulus, suggesting that stimulus overlap is a requirement for suppression. When considered together with our finding that the intensity of low-frequency stimuli required for suppression is greater than that produced by singing males, the overlap require...Continue Reading

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Citations

Aug 10, 2005·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·H E FarrisMichael J Ryan
Jun 19, 2010·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Abhilash Ponnath, Hamilton E Farris
Mar 30, 2000·The Journal of the Acoustical Society of America·H E Farris, R R Hoy
Oct 8, 2011·Brain Research Bulletin·Bart van Alphen, Bruno van Swinderen
Jul 15, 2004·Microscopy Research and Technique·Andrew C Mason, Paul A Faure
Jul 15, 2004·Microscopy Research and Technique·Robert A Wyttenbach, Hamilton E Farris
Jan 26, 2018·Proceedings. Biological Sciences·P M V SimõesI J Russell
May 19, 2020·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Heiner Römer, Marc Holderied

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