International Organization for Standardization

Acoustics - Test methods for the qualification of free-field environments - First Edition
 N 26101

Annotation

This International Standard specifies methodology for qualifying acoustic spaces as anechoic and hemianechoic spaces meeting the requirements of a free sound field.

This International Standard specifies discrete-frequency and broad-band test methods for quantifying the performance of anechoic and hemi-anechoic spaces, defines the qualification procedure for an omni-directional sound source suitable for free-field qualification, gives details of how to present the results and describes uncertainties of measurement.

This International Standard has been developed for qualifying anechoic and hemi-anechoic spaces for a variety of acoustical measurement purposes. It is expected that, over time, various standards and test codes will refer to this International Standard in order to qualify an anechoic or hemi-anechoic space for a particular measurement.

In the absence of specific requirements or criteria, Annex A provides qualification criteria and measurement requirements to qualify anechoic and hemi-anechoic spaces for general purpose acoustical measurements.

This International Standard describes the divergence loss method for measuring the free sound field performance of an acoustic environment.

Автоматический перевод:

Акустика - Методы тестирования для квалификации сред свободного поля - Первый Выпуск