自由栖息的智利海豚（白喙斑纹海豚）的回声定位咔哒声。

Echolocation clicks of free-ranging Chilean dolphins (Cephalorhynchus eutropia).

机构信息

Sea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews KY16 8LB, United Kingdom.

出版信息

J Acoust Soc Am. 2010 Aug;128(2):563-6. doi: 10.1121/1.3353078.

PMID:20707424

Abstract

In this paper, evidence is provided that Chilean dolphins (Cephalorhynchus eutropia) produce ultrasonic echolocation clicks of the narrow-band high-frequency category. Echolocation clicks emitted during approaches of the hydrophones consisted only of narrow-band (rms-BW: 12.0 kHz) single pulses with mean centroid frequencies of about 126 kHz, peak frequencies of 126 kHz, and a 20 dB duration of 82.6 micros. The maximum received level measured exceeded 165 dB re 1 microPa. In addition, high repetition-rate buzzes were recorded during foraging behavior (click interval: 2 ms), but no whistles or calls with tonal components were detected.

摘要

本文提供了证据表明智利海豚（Cephalorhynchus eutropia）会发出窄带高频类别的超声回声定位咔哒声。水听器接近时发出的回声定位咔哒声仅由窄带（均方根带宽：12.0 kHz）单脉冲组成，其平均中心频率约为 126 kHz，峰值频率为 126 kHz，20 dB 持续时间为 82.6 微秒。测量到的最大接收电平超过 165 dB 参考 1 μPa。此外，在觅食行为期间还记录到了高频率的嗡嗡声（咔哒间隔：2 毫秒），但未检测到具有音调成分的口哨声或叫声。