File:Whistle (spectrogram).jpg

This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties. العربية ∙ čeština ∙ Deutsch ∙ Zazaki ∙ English ∙ español ∙ eesti ∙ suomi ∙ français ∙ hrvatski ∙ magyar ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ മലയാളം ∙ Plattdüütsch ∙ Nederlands ∙ polski ∙ português ∙ română ∙ русский ∙ sicilianu ∙ slovenščina ∙ Türkçe ∙ Tiếng Việt ∙ 简体中文 ∙ 繁體中文 ∙ +/−

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• 2011-08-20 11:58 Surajt88 621×321× (65244 bytes) {{Information |Description =This sound was recorded by the autonomous hydrophone deployed at 8oN, 110oW on July 7, 1997 at 0730Z. Origin of the signal is unknown, and it was not detected on any other hydrophone. The band of energy between 1 and 6 Hz re