SV 25S MIRE Microphone

The MIRE microphone SV 25S uses a miniature probe at the entrance of the ear canal to measure the noise exposure (noise dose). The SV 25S microphone works with SV 102+ or SV 102A+ instruments. The microphone adaptor is adjustable so the microphone probe can be installed in a correct position at the entrance of the ear.  The length of the probe is 16mm to ensure the maximum comfort and protect from contact with the eardrum.

The SV 102+ instrument automatically detects type of microphones connected and activates the appropriate compensation filters.

The technique is called the microphone-in-real-ear (MIRE technique). It is applied when the noise source is placed close to the ear. A common application of MIRE is occupational noise measurements in call centers, where the primary sound source is a headset. The SV 25S can be also used to assess noise under headsets and pilots’ helmets.

Following ISO 11904-1:2002, the MIRE requires the use of 1/3 octave analysis with A-weighting correction.

MIRE Microphone User Manual