The effect of signal duration on the underwater hearing thresholds of two harbor seals (Phoca vitulina) for single tonal signals between 0.2 and 40 kHz

2010 ◽  
Vol 127 (2) ◽  
pp. 1135-1145 ◽  
Author(s):  
Ronald A. Kastelein ◽  
Lean Hoek ◽  
Paul J. Wensveen ◽  
John M. Terhune ◽  
Christ A. F. de Jong
Keyword(s):  
Phoca Vitulina ◽  
Signal Duration ◽  
Harbor Seals ◽  
Hearing Thresholds ◽  
Underwater Hearing

Hearing Thresholds of Two Harbor Seals (Phoca vitulina) for Helicopter Dipping Sonar Signals (1.3-1.4 kHz)

2019 ◽  
Vol 45 (3) ◽  
pp. 349-355
Author(s):  
Ronald A. Kastelein ◽  
Robin Gransier ◽  
Marloe Brouwers ◽  
Lean Helder-Hoek
Keyword(s):  
Phoca Vitulina ◽  
Harbor Seals ◽  
Hearing Thresholds

Hearing thresholds, for underwater sounds, of harbor seals (Phoca vitulina) at the water surface

2018 ◽  
Vol 143 (4) ◽  
pp. 2554-2563 ◽  
Author(s):  
Ronald A. Kastelein ◽  
Lean Helder-Hoek ◽  
John M. Terhune
Keyword(s):  
Water Surface ◽  
Phoca Vitulina ◽  
Harbor Seals ◽  
Hearing Thresholds

Detection thresholds of a harbour seal to repeated underwater high-frequency, short-duration sinusoidal pulses

1988 ◽  
Vol 66 (7) ◽  
pp. 1578-1582 ◽  
Author(s):  
J. M. Terhune
Keyword(s):  
High Frequency ◽  
Threshold Energy ◽  
Phoca Vitulina ◽  
Harbour Seal ◽  
Specific Time ◽  
Detection Thresholds ◽  
Time Period ◽  
Hearing Thresholds ◽  
Number Of Cycles ◽  
Underwater Hearing

Underwater hearing thresholds of a harbour seal (Phoca vitulina) were obtained from 1 to 64 kHz using sinusoidal pulses as short as 0.5 ms. The lowest threshold was 57 dB (re 1 μPa) at 8 kHz. Thresholds for 500- to 50-ms tones increased to about 70 dB (re 1 μPa) in the 1- to 4-kHz and 32-kHz ranges and to 111 dB (re 1 μPa) at 64 kHz. At 50 ms duration, thresholds were from 0 to 6 dB greater than the maximum sensitivity for each frequency tested. Thus, only very brief seal vocalizations are not as audible as longer (and equally loud) underwater calls. For pulses shorter than 400 cycles, the thresholds increased linearly with the logarithm of the number of cycles, independent of frequency (4–32 kHz). The total energy of the pulses at threshold was estimated. From 4 to 32 kHz, as the pulse durations shortened, the threshold energy value decreased and then began to increase. These findings bring into question the concept that when presented with high-frequency sound, the auditory system integrates energy for a specific time period.

Hearing thresholds of two harbor seals (Phoca vitulina) for playbacks of multiple pile driving strike sounds

2013 ◽  
Vol 134 (3) ◽  
pp. 2307-2312 ◽  
Author(s):  
Ronald A. Kastelein ◽  
Lean Hoek ◽  
Robin Gransier ◽  
Nancy Jennings
Keyword(s):  
Phoca Vitulina ◽  
Pile Driving ◽  
Harbor Seals ◽  
Hearing Thresholds

Underwater hearing sensitivity of harbor seals (Phoca vitulina) for narrow noise bands between 0.2 and 80 kHz

2009 ◽  
Vol 126 (1) ◽  
pp. 476-483 ◽  
Author(s):  
Ronald A. Kastelein ◽  
Paul Wensveen ◽  
Lean Hoek ◽  
John M. Terhune
Keyword(s):  
Phoca Vitulina ◽  
Harbor Seals ◽  
Hearing Sensitivity ◽  
Underwater Hearing

Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior

Hydrobiologia ◽  
2014 ◽  
Vol 756 (1) ◽  
pp. 75-88 ◽  
Author(s):  
Ronald A. Kastelein ◽  
Lean Helder-Hoek ◽  
Robin Gransier ◽  
John M. Terhune ◽  
Nancy Jennings ◽  
...  
Keyword(s):  
Phoca Vitulina ◽  
Harbor Seals ◽  
Hearing Thresholds

Variation of Male–Male Aggression Patterns in Harbor Seals (Phoca vitulina)

2020 ◽  
Vol 46 (2) ◽  
pp. 119-123
Author(s):  
Anders Galatius ◽  
Jonas Teilmann ◽  
Jakob Tougaard ◽  
Rune Dietz
Keyword(s):  
Phoca Vitulina ◽  
Harbor Seals ◽  
Male Aggression

scholarly journals PCB-Related Alteration of Thyroid Hormones and Thyroid Hormone ReceptorGene Expression in Free-Ranging Harbor Seals (Phoca vitulina)

2006 ◽  
Vol 114 (7) ◽  
pp. 1024-1031 ◽  
Author(s):  
Maki Tabuchi ◽  
Nik Veldhoen ◽  
Neil Dangerfield ◽  
Steven Jeffries ◽  
Caren C. Helbing ◽  
...  
Keyword(s):  
Thyroid Hormone ◽  
Thyroid Hormones ◽  
Phoca Vitulina ◽  
Harbor Seals ◽  
Free Ranging
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