Recording1. The hydrophone and
headphones were both plugged into a cassette tape recorder2. The hydrophone was
submerged into water and then left under water for an hour,
while recording3. The recordings were uploaded,
segmented, and then made into spectrograms
4. Duplicated segments were filtered, and/or amplified (if
needed)
Some instruments used:
Results
Anthropogenic and Bioacoustic sounds
Anthropogenic & Bioacoustic Recordings
0
5
10
15
20
25
30
Day
# of
sou
nds
Anthropogenic sounds
biological sounds
Spectrogram of the Striped Cusk Eel
Spectrogram of Oyster Toad Fish
Circle Line
Dock
Water taxi
Motor Boat
Creak
Jet-Ski
Ferry
Zephyr
Fire boat
Discussion
Frequencies of Sounds in the Hudson
0
500
1000
1500
2000
2500
3000
Conclusion
• Many anthropogenic sounds and bioacoustics sound have been recorded as a range of frequency, instead of at one particular pitch
• Higher amplitudes can not only confuse fish, but even change their behavior
References • Clark, April 10th, 2000 “underwater noise”• Costa, Hayes, December 13th 2001, “underwater acoustics pollution”• Dr. Rountree- Fish Ecology- Listening to Fish• Fay Edds –Walton, October”, 2000, “Frequency response of auditory brown
stem units and toadfish (opsanas tan)• Haynes,frisch- “an illustrated guide to Hudson River Fish- March 1993• Parker-MC Graw Hill Dictionary of scientific and technical terms 1994• Poland fish, Marie. “the production of underwater sound by the northern
seahorse, hippocampus hudsonias. Copeia, vol. 1953, No.2 (May,29,1953) pp 95-99
• Stanne, Panetta,” The Hudson- an illustrated guide to the living river.(1996)• Wenz, G.M. 1962. “Acoustic Ambient Noise in the Ocean: Spectra and
Sources. Journal of the Acoustics Society of America”, 34,1936-1959
Acknowledgements• Cathy Drew• J.T. Boehm
• Jedtsada Laucharoen• Alex Harding
• Chris Anderson• Dr. Sat
Harlem Children Society
• Memorial Sloan Kettering Cancer Center• Mr. Edward Irwin (Freeport High School)
• Ms. Thompson ( Gregorio Luperon High School)
And you for listening!
Thank you!
