제조사 : Br?el & Kjær, B&K
모델명 : 4195
제품명 : Wideband Ear Simulator
제품설명 :
Features
? Design based on ITU? T Rec. P.57, Type 3.2 low-leak and
high-leak simplified pinna simulators
? Includes IEC 60318?4 (formerly IEC 711)-compliant coupler
with ½? microphone and preamplifier
? Individual calibration according to ITU ? T Rec. P.57: supplied
with acoustic impedance and frequency sensitivity response
Wideband Ear Simulator for Telephonometry Type 4195 is designed
for realistic telephone receive response measurements. The design
is based on the specifications in the standard ITU ? T
Recommendation P.57, Artificial Ear Type 3.2 low- and high-leak.
The two grades of well-defined leakage make it possible to simulate
the average real-ear loss for telephone handsets that are held either
comfortably tight (low-leak pinna) or loosely (high-leak pinna)
against the human ear.
The ear simulator is recommended for measurements on supraaural
and supra-concha earphones, both sealed and unsealed,
practically covering all kinds of earphone design. The ear simulator
can be used for wideband telephonometry in the frequency range
100Hz to 8 kHz.
Type 4195 has been developed for use in combination with
Telephone Test Head Type 4602-B and Mouth Simulator Type 4227.
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