Sennheiser NoiseGard HMDC 322 Instructions For Use Manual page 71

Technical data
Headphones
Transducer principle
Ear coupling
Frequency respo nse
Nominal impedance active/passive
Attenuation ( active and passive)
Max. so und pressure level
Contact pressure
Microphone incl. preamplifier
Transducer principle
Frequency respo nse
Sensitivity
Max. so und pressure level
Min. terminating impedance
Output voltage
Supply voltage
34
HMEC 305 HMEC 305-C
dy namic
circumaural, clo sed
45–15,000 Hz
300/150 , mo no
> 25–40 dB
120 dB (±5 %)
approx. 10 N
electret mic capsule,
no ise-compensated,
MKE 45
300–5,000 Hz
–
120 dB
150
400 mV ± 3 dB at 114 dB ( as per RTCA /DO 214)
typ. 16 V DC ( 8–16 V DC, approx. 8–25 mA, as per RTCA/DO 214)
HMEC 322 HMDC 322
50/35
dynamic mic capsule,
noise-compensated,
M-87/AIC
500–4,000 Hz
1.8–4 µV / 74 dB at 5
–
–
–
–
, mono