详情

原文传递 Southeast Alaska Cruise Ship Underwater Acoustic Noise.

题名：	Southeast Alaska Cruise Ship Underwater Acoustic Noise.
作者：	kipple, b.
关键词：	noise measurements, noise spectrum, noise sources, speed dependence, range dependence, comparisons, recommendations, navy, alaska, southeast region, steam turbine engines, noise levels, diesel electric engines, direct diesel engines
摘要：	Between September 2000 and June 2001, the underwater radiated noise levels for six Southeast Alaska cruise ships were measured at the U.S. Navy's Southeast Alaska Acoustic Measurement Facility near Ketchikan, Alaska. The primary objective of this project was to quantify noise levels typical of large cruise ships common to Southeast Alaska. This group of ships included diesel-electric, direct-diesel, and steam turbine propulsion plant ships ranging in size from 23 to 77 thousand gross tons and from 617 to 856 feet in length. Ten-knot overall sound levels ranged from 175 to 185 dB relative to 1 microPascal at 1 yard with the highest one-third octave band level at 182 dB. The 10-knot sound level for the steam turbine ship was the lowest among the ships tested, but no ship was clearly the loudest or quietest at all frequencies. Propulsion system type and cavitation performance were important factors in cruise ship noise character. / NOTE: Technical rept. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0813；92p
报告类型：	科技报告