Category Archives: ASA

ASA S12.70-2016

American National Standard Criteria for Evaluating Speech Privacy in Healthcare Facilities

Published by: 2016-07-19 / 2016-07-19
This standard provides acoustical performance criteria, design requirements, and design guidelines to
meet the speech privacy needs for both new design and retrofits of healthcare facilities. This
document provides a) a method for selecting speech privacy goals based on occupant needs, by type
of space and use, b) design requirements and guidelines for developing a strategy for the architectural
design and acoustical materials selection, and c) a method for verifying and analyzing speech privacy
design performance.

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ASA S1.6-2016

American National Standard Preferred Frequencies, Frequency Levels, and Band Numbers for Acoustical Measurements

Published by: 2016-08-15 / 2016-08-15 / 18 pages
This standard defines preferred frequencies and nominal filter band center frequencies to be used for
acoustical measurements. Exact filter center frequencies for constant percent bandwidth filter banks are
calculated using ordinal integer band numbers. The differences between the preferred frequencies for pure
tone measurements and constant percent bandwidth filter center frequencies are described.

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ASA S3.7-2016

American National Standard Method for Measurement and Calibration of Earphones

Published by: 2016-08-22 / 2016-08-22 / 46 pages
This standard describes measurement methods for earphones and earphone transducers using couplers
or ear simulators. Guidance is provided for the selection of the appropriate coupler or ear simulator for a
given earphone and application. Methods for measurement of calibrated frequency response, inputoutput
linearity, electrical impedance, and non-linear distortion, are described.

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ASA S1.11-2016/Part 2 / IEC 61260:2-2016

American National Standard: Electroacoustics – Octave-band and Fractional-octave-band Filters – Part 2: Pattern-evaluation Tests (a nationally adopted international standard)

Published by: 2016-07-19 / 2016-07-19 / 30 pages
This part provides details of the tests necessary to verify conformance to all mandatory specifications
given in ANSI/ASA S1.11-2014/Part 1/IEC 61260-1:2014 for octave-band and fractional-octave-band
filters. Tests and test methods are applicable to class 1 and class 2 bandpass filters. The aim is to ensure
that all testing laboratories use consistent methods to perform pattern-evaluation tests.

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ASA S1.11-2016/Part 3 / IEC 61260:3-2016

American National Standard: Electroacoustics – Octave-band and Fractional-octave-band Filters – Part 3: Periodic Tests (a nationally adopted international standard)

Published by: 2016-07-19 / 2016-07-19 / 28 pages
This part describes procedures for periodic testing of octave-band and fractional-octave-band filters that
were designed to conform to the class 1 or class 2 specifications given in ANSI/ASA S1.11-
2014/Part 1/IEC 61260-1:2014. The aim of this standard is to ensure that periodic testing is performed in a
consistent manner by all laboratories.

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ASA S3.52-2016

American National Standard Measurements of the Threshold of Hearing and Signal Detectability in a Sound Field

Published by: 2016-01-06 / 2016-01-06 / 40 pages
The standard covers requirements, conditions, and procedures for threshold-of-hearing measurements
in a sound field. However, the standard may also be used for conducting other sound-field hearing tests
and as a research tool for assessing the effects of listening conditions and headgear worn by the listener
on detectability of various test signals. Three sound fields are referenced in the standard: the free sound
field, the quasi-free sound field, and the diffuse sound field. The test signals covered by the standard
are frequency-modulated tones (warble tones) and narrow-band noises. However, other calibrated
signals that meet requirements of this standard may also be used. The standard applies to binaural
Iistening to test signals presented by one or more loudspeakers in a test room. Monaural air conduction
hearing thresholds may also be determined if the opposite ear can be properly occluded. Special
application of the standard to the assessment of spatial hearing is presented in Annex B.

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ASA S12.53-1999/Part 2 / ISO 3743-2:1994 (R2015)

American National Standard Acoustics – Determination of sound power levels of noise sources using sound pressure – Engineering methods for small, movable sources in reverberant fields – Part 2: Methods for special reverberation test rooms

Published by: 1999-10-18 / 1999-10-18 / 38 pages
ISO 3743 is one of the ISO 3740 series, which specifies various methods for determining the sound
power levels of machines, equipment and sub-assemblies. These basic standards specify the acoustical
requirements for measurements appropriate for different test environments as shown in table 0.1.
When selecting one of the methods of the ISO 3740 series, it is necessary to select the most
appropriate for the conditions and purposes of the noise test. General guidelines to assist in the
selection are provided in ISO 3740. The ISO 3740 series gives only general principles regarding the
operating and mounting conditions of the machine or equipment under test. Reference should be made
to the noise test code for a specific type of machine or equipment, if available, for
specifications on mounting and operating conditions.

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ASA S12.55-2012 / ISO 3745:2012

American National Standard Acoustics – Determination of sound power levels of noise sources using sound pressure – Precision methods for anechoic and hemi-anechoic rooms

Published by: 2012-08-23 / 2012-08-23 / 88 pages
This American National Standard specifies methods for measuring the sound pressure levels on a
measurement surface enveloping a noise source (machinery or equipment) in an anechoic room or a
hemi-anechoic room. The sound power level (or, in the case of impulsive or transient noise emission,
the sound energy level) produced by the noise source, in frequency bands of width one-third octave or
with frequency weighting A applied, is calculated using those measurements, including corrections to
allow for any differences between the meteorological conditions at the time and place of the test and
those corresponding to a reference characteristic acoustic impedance.

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ASA S3.55-2014/Part 5 /IEC 60318-5:2006 (MOD)

American National Standard Electroacoustics – Simulators of Human Head and Ear – Part 5: 2 cm*2 Coupler for the Measurement of Hearing Aids and Earphones Coupled to the Ear by Means of Ear Inserts (a modified nationally adopted international standard)

Published by: American National Standards of the Acoustical Society of America / 2014-07-21 / 20 pages
This part of ANSI/ASA S3.55 / IEC 60318 describes an acoustic coupler for loading an earphone or
hearing aid with a specified acoustic impedance when determining its physical performance
characteristics, in the frequency range 125 Hz to 8 kHz. It is suitable for air conduction hearing aids
and earphones, coupled to the ear by means of ear inserts e.g. ear molds or similar devices.

The sound pressure developed by an earphone is not, in general, the same in the coupler as in a
person’s ear. However, it can be used as a simple and ready means for the exchange of specifications
and of physical data on hearing aids and for the calibration of specified insert earphones used in
audiometry.

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ASA S1.17-2014/Part 1

American National Standard for Microphone Windscreens – Part 1: Measurements and Specifications of Insertion Loss in Still Air

Published by: American National Standards of the Acoustical Society of America / 2014-04-29 / 34 pages
This standard describes test procedures for determining the insertion loss of windscreens mounted on measurement microphones. Insertion loss is determined over a specified frequency range and for still-air conditions in the test facility.

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