Hello. Sign In   |    Help & Support   |    Contact Us   |   
Standards Store
  •  Shopping Cart  (0) 
      Your Shopping Cart is empty.
      If you already have an account, Sign In
      If you are new to IHS, Create New Account
SEARCH:
and/or  
ANSI/ASA S12.64 PART 1 (Complete Document)
Revision / Edition: 09    Chg: W/ REAF    Date: 09/10/14   Abbreviations Definitions
Active, Most Current
AMERICAN NATIONAL STANDARD QUANTITIES AND PROCEDURES FOR DESCRIPTION AND MEASUREMENT OF UNDERWATER SOUND FROM SHIPS - PART 1: GENERAL REQUIREMENTS
Published By:Acoustical Society of America (ASA)
Page Count:34
PDF :
$120.00 USD
  In Stock
Print :
$120.00 USD
  In Stock
PDF + Print
$ 168.00 USD
You save 30% In Stock
Product Family
Previous Editions
Referenced Items
There are no items in this referenced list
People Also Bought These
AAMI HE75
ANSI/ISEA Z358.1
AGMA 2001
ANSI Z117.1
ANSI Z136.4
More...
Related Products
There are no related products.
IHS Standards Expert
Description / Abstract Back to Top
This part of ANSI/ASA S12.64 describes the general measurement systems, procedures, and methodologies used for the measurement of underwater sound pressure levels from ships at a prescribed operating condition. It contains methodology for the reporting of one-third octave band sound pressure levels. The resulting quantities are the sound pressure levels normalized to a distance of 1 m. Since the underwater sound pressure levels are affected by the presence of the free surface (and sometimes the bottom), such quantities are considered "affected source levels," herein referred to as source levels.

The underwater sound pressure level measurements are performed in the geometric far field and then adjusted to the 1 m normalized distance for use in comparison with appropriate underwater noise criteria. However, this standard does not specify or provide guidance on underwater noise criteria or address the potential effects of noise on marine organisms. This standard is applicable to any and all underway surface vessels, either manned or unmanned. The methods have no inherent limitation on minimum or maximum vessel size.

This standard is not applicable to submerged vessels or to aircraft. This standard is limited to vessels transiting at speeds no greater than 50 knots (25.70 m/s). The measurement methods mitigate the variability caused by Lloyd's Mirror surface image coherence effects (see 3.16), but do not exclude a possible influence of bottom reflections. No specific computational adjustments for either of these effects are part of this standard. A specific ocean location is not required to use this standard, but the requirements for an ocean test site are provided.

The intended uses of the methods described in this standard are: to show compliance with contract requirements, to enable periodic signature assessments, and for research and development. The intended users include: government agencies, research vessel operators, and commercial vessel owners that need to operate in acoustically sensitive waters.

This standard offers three grades of measurement, each with a stated applicability, test methodology, uncertainty, system repeatability, and complexity. A summary of the attributes of each "Grade" (denoted A, B, and C) is given in Table 1.
Additional Supplemental Documents

Prices subject to change without notice.
Help & Support
Home
Help & Support
Office Locations
Abbreviations Definitions
Products
Shop by Industry
Browse Publishers & Products
Featured Products
New Releases
Top Sellers
Tools & Services
Research Center
Alerts & Content Tools
Deposit Accounts
Standing Orders
Free Newsletters
Solutions
Individual Standards
Custom Online Collections
Online Corporate Solutions
 
Visit www.ihs.com
About IHS  |   Contact Us  |   Careers  |   Investors  |   Site Map  |   Privacy Policy  |   Terms of Use (c) 2014 IHS.