Measurement Microphone MM 302
The 1/4 ”measuring microphone MM 302 opens up the possibility of using high quality, externally polarized measuring microphone capsule MK 301 on measuring systems with 7-pin. LEMO connection to be used.
The electrical connection is made via a permanently connected, three-meter-long cable including a 7-pin LEMO connector.
The MH 64 microphone holder with a 1/4 ”cone is recommended for holding the microphone. The use of the 1/4 ”measuring microphone capsule accessories, such as a windshield etc., is possible without any problems.
The measurement microphone can be calibrated with the Pistonfon Type 5002 or with other suitable sound pressure calibrators using a 1/4 “adapter.
|Converter type||Capacitive pressure receiver, according to WS3F (DIN EN IEC 61094-4)|
|Operating transfer coefficient||5 mV / Pa|
|Operational transmission rate||-46 dB ± 1.5 dB re 1V / Pa|
|Free field correction for 1 kHz||0 dB|
|Diffuse field correction for 1 kHz||0 dB|
|Reference direction||Microphone axis|
|Frequency range of the free field transmission factor||5 Hz to 100 kHz (± 2 dB)|
|Polarization voltage||200 V|
|Limit sound pressure level for 3% harmonic distortion at 1 kHz||168 dB|
|Limit sound pressure level||with reduced no-load supply voltage (UL = 28 V DC)||157 dB|
|Output voltage||≤ 35 Veff|
|Output impedance||<100 ohms|
|Nominal terminating impedance||100 kOhm|
|Start-up time||1 min.|
|Equivalent noise level DIN EN 60651||35 dBA|
|Magnetic field influence 80 A / m, 50 Hz|
|Influence of mechanical vibrations 1 m / s²|
|Working temperature range ˂ ± 0.5 dB||-25 ° C to +100 ° C|
|Moisture limits||rH <100%, condensation not allowed|
|Temperature coefficient||≤ 0.01 dB / K|
|Static pressure coefficient||1×10-5 dB / Pa|
|Temperature limits||-50 ° C to +100 ° C|
|diameter||with protective cap||6.35 mm ± 0.02 mm|
|without protective cap||7.0 mm ± 0.02 mm|
|Thread for preamplifier||5.7mm 60 US|
|Thread for protective cap||6.35mm 60 US|
|Memory for microphone identification||–|