Searched for: subject:"Hearing%5C+acuity"
(1 - 4 of 4)
document
Kastelein, R.A. (author), Helder-Hoek, L. (author), Cornelisse, S.A. (author), von Benda-Beckmann, A.M. (author), Lam, F.P.A. (author), de Jong, C.A.F. (author), Ketten, D.R. (author)
Noise-induced temporary hearing threshold shift (TTS) was studied in a harbor porpoise exposed to impulsive sounds of scaled-down airguns while both stationary and free-swimming for up to 90 min. In a previous study, ∼4 dB TTS was elicited in this porpoise, but despite 8 dB higher single-shot and cumulative exposure levels (up to 199 dB re 1...
article 2020
document
van Wijngaarden, S.J. (author), van Balken, J.A. (author)
A novel approach for disrupting offensive chants at sporting events is proposed, based on attacking synchronization between individuals. Since timing is crucial for coordination between chanters, disruption of timing is expected to be effective against undesired chants. Delayed auditory feedback is known to disrupt timing in individual sound...
article 2007
document
Kastelein, R.A. (author), van Schie, R. (author), Verboom, W.C. (author), de Haan, D. (author), TNO Defensie en Veiligheid (author)
The unmasked underwater hearing sensitivities of an 8-year-old male and a 7-year-old female Steller sea lion were measured in a pool, by using behavioral psychophysics. The animals were trained with positive reinforcement to respond when they detected an acoustic signal and not to respond when they did not. The signals were narrow-band,...
article 2005
document
Kastelein, R.A. (author), Janssen, M. (author), Verboom, W.C. (author), de Haan, D. (author), TNO Defensie en Veiligheid (author)
Receiving beam patterns of a harbor porpoise were measured in the horizontal plane, using narrow-band frequency modulated signals with center frequencies of 16, 64, and 100 kHz. Total signal duration was 1000 ms, including a 200 ms rise time and 300 ms fall time. The harbor porpoise was trained to participate in a psychophysical test and...
article 2005
Searched for: subject:"Hearing%5C+acuity"
(1 - 4 of 4)