ML111934

視聴覚メディア・ノート

NOTES: Captive in test tank: low knocking and thunps stimulated by handling and ES [electric stimulation] Twenty captives in concrete tank (6 m long): only water noise when swimming rapidly at surface. Original internal preamplifier of Brush AX58-C replaced by NML 12AY7 parallel cathode follower (Sensitivity: -81 dBV/mbar; System response: 20 Hz-15 kHz ± 4dB. Fish, M.P. and W.H. Mowbray. 1970. Sounds of the Western North Atlantic fishes: a reference file of biological underwater sounds. Johns Hopkins Press. Baltimore. p. 5.