Accession Number:

AD0739320

Title:

Project MASSAWA: Attenuation of Low Frequency Sound in the Red Sea.

Descriptive Note:

Technical memo.,

Corporate Author:

NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CONN NEW LONDON LAB

Personal Author(s):

• Browning,David G.
• Jones,Everett N.
• LaPlante,Robert F.
• Mellen,Robert H.
• Thorp,William H.

Report Date:

1970-11-18

Pagination or Media Count:

8.0

Abstract:

Extensive measurements in the Atlantic Ocean 4 degrees C have shown the attenuation of sound below 10 kHz to be anomalously high. In order to determine the temperature dependency of this anomaly, a similar experiment has been conducted in the warmer water 22 degrees C of the Red Sea. The results show a shift in the apparent relaxation frequency from the 1 kHz observed in the Atlantic to 1.5 kHz, resulting in higher values of the attenuation coefficients in the range 1-6 kHz. The computer activation energy is comparable with that expected for hydrogen bonding. Author

Descriptors:

• (*UNDERWATER SOUND
• *RED SEA)
• LOW FREQUENCY
• ATTENUATION
• ANOMALIES
• SALINITY
• TEMPERATURE

Subject Categories:

• Physical and Dynamic Oceanography
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE