Deutsches Meeresmuseum, Katharinenberg 14-20, 18439 Stralsund, Germany.
University Rostock, Universitätsplatz 1, 18055 Rostock, Germany.
J Acoust Soc Am. 2020 Oct;148(4):EL382. doi: 10.1121/10.0002347.
Porpoise echolocation parameters may vary depending on their acoustic habitat and predominant behavior. Research was conducted in the Wadden Sea, an acoustically complex, tidally driven habitat with high particle resuspension. Source levels and echolocation parameters of wild harbor porpoises were estimated from time-of-arrival-differences of a six-element hydrophone array. The back-calculated peak-to-peak apparent source level of 169 ± 5 dB re 1 μPa was significantly lower than reported from Inner Danish Waters (-20 dB) and British Columbia (-9 dB) with narrower bandwidth. Porpoises therefore reduce their source level in the Wadden Sea under acoustically complex conditions suggesting an avoidance of cluttering.
海豚的回声定位参数可能因其声学栖息地和主要行为而有所不同。研究在瓦登海进行，这是一个声学复杂、潮汐驱动、颗粒再悬浮率高的栖息地。野生港湾海豚的声源级和回声定位参数是根据六元素水听器阵的到达时间差估算出来的。反推得出的峰值-峰值视在声源级为 169 ± 5 dB re 1 μPa，明显低于在丹麦内水域（-20 dB）和不列颠哥伦比亚省（-9 dB）报道的值，带宽也更窄。因此，海豚在瓦登海复杂的声学条件下降低了声源级，这表明它们在避免混响。
