标准编号：ISO 17208-1:2016
中文名称：水下声学 来自船舶的水下声音的描述和测量的量与规程 第1部分：用于比较用途的深水精密测量要求
英文名称：Underwater acoustics — Quantities and procedures for description and measurement of underwater sound from ships — Part 1: Requirements for precision measurements in deep water used for comparison purp
发布日期：2016-03
标准范围
This part of ISO 17208 specifies the general measurement system, procedure, and methodology usedfor the measurement of underwater sound from ships under a prescribed operating condition. It doesnot specify or provide guidance on underwater noise criteria or address the potential effects of noiseon marine organisms.The resulting quantities are based on the root-mean-square sound pressure levels (SPL), herein usedsynonymously with sound pressure level or SPL measured in the far field of the ship and normalizedto a distance of 1 m and reported in one-third octave bands (see 4.3). In this part of ISO 17208, theresult of these measurements is called “radiated noise level”. The underwater sound pressure levelmeasurement is performed in the geometric far field and then adjusted to the 1 m normalized distancefor use in comparison with appropriate underwater noise criteria.This part of ISO 17208 is applicable to any and all underway surface vessels, either manned orunmanned. It is not applicable to submerged vessels or to aircraft. The method has no inherentlimitation on minimum or maximum ship size. It is limited to ships transiting at speeds no greater than50 kn (25,7 m/s).The measurement method smooths the variability caused by Lloyd’s mirror surface image coherenceeffects, but does not exclude a possible influence of propagation effects like bottom reflections,refraction and absorption. No specific computational adjustments for these effects are provided inthis part of ISO 17208. A specific ocean location is not required to use this part of ISO 17208, but therequirements for an ocean test site are provided.The intended uses of the method described in this part of ISO 17208 are: to show compliance withcontract requirements or criteria, for comparison of one ship to another ship, to enable periodicsignature assessments, and for research and development. The intended users include governmentagencies, research vessel operators, and commercial ship owners.Additional post-processing would be required to use the data obtained from this measurement methodfor determination of the ship source levels to perform far field noise predictions such as needed formost environmental impact studies or for creating underwater noise contour maps.
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