144
Technical data
HMEC 305
앚
HMEC 305-C
앚
HMEC 322
앚
HMDC 322
Headphones
Transducer principle
dynamic
Ear coupling
circumaural, closed
Frequency response
45–15,000 Hz
Nominal impedance active/passive
300/150
Ω
, mono
앚
50/35
Ω
, mono
Attenuation (active and passive)
> 25 – 40 dB
Max. sound pressure level
120 dB (
±
5%)
Contact pressure
approx. 10 N
Microphone incl. preamplifier
Transducer principle
electret mic capsule,
앚
dynamic mic capsule,
noise-compensated,
앚
noise-compensated,
MKE 45-1
앚
M-87/AIC
Frequency response
300–5,000 Hz
앚
500–4,000 Hz
Sensitivity
–
앚
1.8–4
µ
V / 74 dB at 5
Ω
Max. sound pressure level
120 dB
앚
–
Min. terminating impedance
150
Ω
앚
–
Output voltage
400 mV
±
3 dB at 114 dB (as per RTCA/DO 214)
앚
–
Supply voltage
typ. 16 V DC (8 – 16 V DC, approx. 8 – 25 mA, as per RTCA/DO 214)
앚
–