描述：Usuccessfully testing the homemade hydrophone created with some zip ties, a 1/8 stereo extension (3.5mm) and a balloon in some small fresh water lakes at night with the DS40, converted to WAV with switch.
描述：Squeaky playground swing while testing the homemade hydrophone created with some zip ties, a 1/8 stereo extension (3.5mm) and a balloon in some small fresh water lakes at night with the DS40, converted to WAV with switch.< /p>