{"refrec":{"BRefID":338021,"RR":"<b>Kastelein, R.A.; Helder-Hoek, L.; Cornelisse, S.A.; Huijser, L.A.E.; Gransier, R.</b> (2020). Temporary hearing threshold shift at ecologically relevant frequencies in a harbor porpoise (<i>Phocoena phocoena</i>) due to exposure to a noise band centered at 88.4 kHz. <i>Aquat. Mamm. 46(5)</i>: 444-453. <a href=\"https://hdl.handle.net/10.1578/AM.46.5.2020.444\" target=\"_blank\">https://hdl.handle.net/10.1578/AM.46.5.2020.444</a>","BEntID":334645,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Aquat. Mamm. 46(5)</i>: 444-453. <a href=\"https://hdl.handle.net/10.1578/AM.46.5.2020.444\" target=\"_blank\">https://hdl.handle.net/10.1578/AM.46.5.2020.444</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Kastelein, R.A.; Helder-Hoek, L.; Cornelisse, S.A.; Huijser, L.A.E.; Gransier, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Kastelein, R.A. <i>et al.</i>","Englishabstract":"Susceptibility to temporary hearing threshold shift (TTS) in harbor porpoises (<em>Phocoena phocoena</em>) depends on the frequency of the fatiguing sound causing the shift. TTS in harbor porpoises has been tested for sounds within the 1 to 63 kHz frequency range. Susceptibility to TTS caused by sounds of ~88 kHz is ecologically relevant since these sounds are expected to affect hearing in the frequency range of harbor porpoise echolocation signals. TTS was quantified in a female porpoise after exposure for 1 h to a continuous one-sixth-octave noise band centered at 88.4 kHz, at average received sound pressure levels of 137 to 161 dB re 1 µPa (resulting sound exposure levels [SELs]: 173 to 197 dB re 1 µPa<sup>2</sup>s). To quantify TTS and recovery, hearing thresholds for 88.4, 100, and 125 kHz tonal signals were determined before and after exposure. Control trials were used as a baseline and to determine which exposure levels resulted in statistically significant TTS in the 4 min after the fatiguing sound stopped (TTS<sub>1-4</sub>). At 88.4 kHz, the lowest SEL that resulted in significant TTS<sub>1-4</sub> (3.6 dB) was 185 dB re 1µPa<sup>2</sup>s; at 100 kHz, the lowest SEL that resulted in significant TTS<sub>1-4</sub> (5.2 dB) was 191 dB re 1 µPa<sup>2</sup>s; and at 125 kHz, the lowest SEL that resulted in significant TTS<sub>1-4</sub> (5.4 dB) was 191 dB re 1 µPa<sup>2</sup>s. At higher SELs, the TTS at this frequency remained similar. The highest TTS<sub>1-4</sub> (13.1 dB) occurred at 100 kHz after exposure to an SEL of 197 dB re 1 µPa<sup>2</sup>s. In most cases, hearing recovered within 12 min after the fatiguing sound stopped; in the remaining cases, recovery took less than 1 h. TTS onset (defined as 6 dB TTS; Southall et al., 2019) occurred after exposures to SELs of ~191 dB re 1 µPa<sup>2</sup>s (when hearing was measured at 100 kHz, one third of an octave above the center frequency of the fatiguing sound).","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Temporary hearing threshold shift at ecologically relevant frequencies in a harbor porpoise (<i>Phocoena phocoena</i>) due to exposure to a noise band centered at 88.4 kHz","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-07 01:31:46.400504","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"anthropogenic noise; audiogram; frequency weighting; harbor porpoise; Phocoena phocoena; hearing; hearing damage; hearing loss; hearing sensitivity; odontocete; temporary threshold shift; TTS","OtherDescriptors":null,"Notes":null,"AnaPub":2020,"MonPub":null,"DateUpdate":"2021-05-29","DateCreate":"2021-05-17","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000569516800002","VABBcode":null,"OpenAcc":0,"Handle":"10.1578/AM.46.5.2020.444"},"refs":null,"anarec":{"AnaID":338021,"PubliDate":2020,"Pagination":"444-453","XtraPublOfAnaID":null,"ISBN":null,"Volume":"46","Issue":"5","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42200,"SerRR":"Aquatic Mammals. 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