Sennheiser HMDC 27 Professional Broadcast Headset and Cable with NoiseGard
The HMDC 27 Professional Broadcast Headset and Cable with NoiseGard from Sennheiser is a closed, circumaural ear-cup design that features active-noise reduction to perform well in very loud environments.
Impedance
64 ohms
Frequency response (Microphone)
40 Hz – 18 kHz
Transducer principle (Microphone)
dynamic
Frequency response (Headphones)
8 Hz – 18 kHz
Microphone
BMD 434
Max. sound pressure level
ActiveGard™ Limiter off: 128 dB SPL @ 1 kHz
ActiveGard™ Limiter on: 110 dB SPL @ 1 kHz
Contact pressure
approx. 3.3 N
Ear coupling
circumaural
Pick-up pattern
Hyper-cardioid
Microphone sensitivity
0.5 mV/Pa @ 1 kHz
Maximum sound pressure level (passive)
128 dB SPL @ 1 kHz
ActiveGard®
110 dB SPL @ 1 kHz
Distortion
< 0.1% @ 1 kHz, 100 dB SPL
Transducer principle (headphones)
dynamic, closed
Weight w/o cable
approx. 240 g