Acoustics. Measurement of sound absorption properties of road surfaces in situ - Extended surface method Ingestion-build-59651 with every tool change)

with every tool change)

which has the effect that they de-phase the nonlinear interactions between the signals

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Hearing protectors are commonly used to reduce the noise to which the ear is exposed

The test method specified may be used for many purposes

Acoustics. Measurement of sound absorption properties of road surfaces in situ - Extended surface method Ingestion-build-59651 with every tool change)1 Scope This part of ISO 13472 describes a test method for measuring in situ the sound absorption coefficient of road surfaces as a function of frequency in the range from 250 Hz to 4 kHz. Normal incidence is assumed. However, the test method can be applied at oblique incidence although with some limitations (see annex F). The test method is intended for the following applications: determination of the sound absorption properties of test tracks