HATS Type 4128-C, Handset Positioner Type 4606 – User Manual58
7.2 Specifications Type 4128-C and 4128-D
LISTENER FREQUENCY RESPONSE
Conforms to ITU-T Rec. P.58 for measurements on
telecommunications devices and to IEC60318–7 and
ANSI S3.36–1985 for measurements on air conducting
hearing aids
EAR SIMULATOR
IEC 60318–4/ITU-T Rec. P.57 Type 3.3-based
calibrated ear simulator complying with ITU-T Rec.
P.57, IEC 60318–4 and ANSI S3.25 standards. Output
from the ear simulator is via a 7-core 3 m cable (2.3 m
from the bottom of the torso) terminated with a Lemo
(1B) plug. For connection to a preamplifier input socket
of Brüel & Kjær Power Supplies, Analyzers, etc., a
Lemo-to-Brüel & Kjær adaptor is supplied
Typical Sensitivity:
12.6 mV/Pa (–38 dB re 1 V/Pa) at 250 Hz
3% Distortion Level:
162dB re 20Pa at eardrum position
LEFT EAR TO RIGHT EAR TRACKING
±1 dB up to 5 kHz, ±3 dB up to 8kHz (measured using
the same ear simulator)
PINNA SIMULATORS
Dimensions similar to those specified in ITU-T Rec.
P.58, IEC 60318–7 and ANSI S3.36. Minor
adjustments in the dimensional details have been
made which enable Type 4128-C to conform with the
acoustic specifications of these documents in the
frequency range 100 Hz to 8 kHz. Types 4158-C and
4159-C are supplied with calibrated pinna simulators
with hardness shore-OO 35. An additional pair of
uncalibrated hard pinna simulators are available as
accessories
MOUTH SIMULATOR
Input to mouth simulator via 0.75 m cables (0.2m from
the bottom of the torso) terminated with banana-
sockets
Sound Pressure Distribution: conforms to ITU-T
Rec. P.58
Mouth Opening: W H: 30 11mm (1.18 0.43)
Equivalent Lip Plane Position, CL: 6 mm in front of
the sound radiation opening
Mouth Reference Point, MRP:
25mm in front of mouth CL
Continuous Output Level at MRP:
Min. 110 dB SPL, 200 Hz to 2kHz
Min. 100 dB SPL, 100 Hz to 8 kHz
Typical Sensitivity at 1kHz: 80dB SPL 2V/500 mm
Distortion (Harmonic Components up to 8 kHz) at
94dB SPL:
<2%, 200 Hz to 250 Hz
<1% >250Hz
Max. Average Input Power: 10 W max. continuous
average power (at 20C (68F))
Max. Pulsed Input Power: 50 W for 2 seconds
CAUTION: If the mouth simulator is excited
with pulses of more than 50 W, damage may
occur before the protection circuit reacts
Loudspeaker Impedance: 4
DIMENSIONS AND WEIGHT
The main dimensions comply with the dimensional
requirements of ITU-T Rec. P.58 and the reports from
IEC60318–7 and ANSIS3.36-1985
Total Height, Head and Torso: 695mm (27.4)
Torso:
Height: 460 mm (18)
Width: 410 mm (16)
Depth: 183 mm (7.2)
External Neck Diameter: 112mm (4.4)
Head Angles: Vertical or 17
Weight: 9 kg (19.8 lb.)
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