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ASA: Acoustical Society of America

ASA, the Acoustical Society of America, is a nonprofit organization that develops and publishes standards on acoustics, mechanical shock, noise and other associated subjects. Headquartered near New York City, United States, ASA is composed of nearly 7,000 members and is a founding member of the American Institute of Physics. ASA also serves as the administrator for the U.S. TAGs (United States Technical Advisory Group) to ISO/TCs 43 and 108 (International Organization for Standardization/Technical Committee) and to various subcommittees within each. Standards from ASA are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: or 1-212-642-4980 or Request Proposal Price.

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ANSI/ASA S12.2-2019

Criteria for Evaluating Room Noise

This Standard provides three primary methods for evaluating room noise: a survey method that employs the A-weighted sound level; an engineering method that employs expanded noise criteria (NC) curves; and a method for evaluating low-frequency fluctuating noise using room noise criterion (RNC) curves.

ANSI/ASA S3.6-2018

Specification for Audiometers

The audiometers covered in this specification are devices designed for use in determining the hearing threshold level of an individual in comparison with a chosen standard reference threshold level. This standard provides specifications and tolerances for pure tone, speech, and masking signals and describes the minimum test capabilities of different types of audiometers.

ANSI/ASA S3.5-1997 (R2017)

Methods for Calculation of the Speech Intelligibility Index

Defines a method for computing a physical measure that is highly correlated with the intelligibility of speech as evaluated by speech perception tests given a group of talkers and listeners. This measure is called the speech Intelligibility Index, SII. The SII is calculated from acoustical measurements of speech and noise.

ANSI/ASA S12.6-2016 (R2020)

Methods for Measuring the Real-Ear Attenuation of Hearing Protectors

This standard specifies laboratory-based procedures for measuring, analyzing, and reporting the passive noise-reducing capabilities of hearing protectors.

ANSI/ASA S2.26-2001 (R2020)

American National Standard Vibration Testing requirements and Acceptance Criteria for Shipboard Equipment

This national standard defines vibration test requirements for shipboard equipment and machinery components. The tests are intended to locate resonances of the equipment and impose endurance tests at these frequencies, if any. The frequency range of the tests is 4 Hz to 50 Hz (100 Hz for reciprocating machinery-mounted equipment).

ANSI/ASA S2.73-2013/ISO 10819:2013 (R2019)

Mechanical vibration and shock - Hand-arm vibration - Measurement and evaluation of the vibration transmissibility of gloves at the palm of the hand (a nationally adopted international standard)

This American National Standard specifies a method for the laboratory measurement, data analysis, and reporting of the vibration transmissibility of a glove with a vibration-reducing material that covers the palm, fingers, and thumb of the hand. This American National Standard specifies vibration transmissibility in terms of vibration transmitted from a handle through a glove to the palm of the hand in one-third-octave frequency bands with center frequencies of 25 Hz to 1,250 Hz.

ANSI/ASA S12.6-2016 (R2020)

Methods for Measuring the Real-Ear Attenuation of Hearing Protectors

This standard specifies laboratory-based procedures for measuring, analyzing, and reporting the passive noise-reducing capabilities of hearing protectors.

ANSI/ASA S12.60/Part 1-2010 (R2020)

Acoustical Performance Criteria, Design Requirements, and Guidelines for Schools, Part 1: Permanent Schools

Part 1 of ANSI/ASA S12.60 is applicable to core learning spaces and classrooms with interior volumes not exceeding 566 m3 (20 000 ft3) and to ancillary learning spaces of any volume. Learning spaces with volumes larger than 566 m3 (20 000 ft3) are considered ancillary learning spaces for purposes of this standard.

ANSI/ASA S2.75-2017/Part 1 (R2020)

Shaft Alignment Methodology, Part 1: General Principles, Methods, Practices, and Tolerances

Establishes methodology consistent with industry best practices for the measurement, analysis, and correction of alignment of shafts on rotating machinery coupled by means of a flexible coupling where such shafts are supported by two bearings in independent, horizontally mounted machine cases. Electric motors driving a pump, fan, or similar machine are examples of this type of machinery. Rigidly coupled machines are outside of the scope of Part 1 of this standard.


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