This standard specifies microphone-in-real-ear (MIRE) methods for the measurement of the insertion
loss of active and passive circumaural earmuffs, helmets, and communications headsets, and
specifies acoustic test fixture (ATF) methods for the measurement of the insertion loss of active and
passive earplugs, earmuffs, helmets, and communications headsets. The MIRE methods are
appropriate for use with continuous noise whereas the ATF methods may be used with both
continuous noise and high-level impulsive noise test signals. The standard contains information on
instrumentation, calibration, and electroacoustic requirements, procedures for determining sound
pressure levels in the ear with and without the hearing protection devices in place, and procedures for
calculating the corresponding insertion loss values. The standard also describes how to combine the
active contribution of insertion loss for active devices measured using the MIRE method with the
passive real-ear attenuation measured in accordance with ANSI/ASA S12.6 to obtain an attenuation
value for use in estimating sound pressure levels for active protectors in accordance with ANSI/ASA
S12.68. Requirements for reporting of the data are also described.
| ANSI : | ANSI Approved |
| File Size : | 1
file
, 1.5 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 66 |
| Published : | 01/11/2010 |
