otometrics MADSEN Midimate 622, Руководство пользователя

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APPENDIX A: TECHNICAL SPECIFICATIONS
Channels Two separate channels: one for stimulus and one for masking.
Frequencies Air, Free Field: 125-250-500-750-1000-1500-2000-3000-
4000-6000-8000 Hz.
Bone: 250-500-750-1000-1500-2000-3000-4000-6000 Hz.
Masking Contralateral and Ipsilateral. Binaural st masking.
White Noise, Speech Noise and Narrow Band Noise.
Attenuator Range -10 to +149 dB in 5 dB steps with Range Extender function.
Resolution: 1 dB or 5 dB steps.
Fully clickfree operation over entire range.
Hearing Level Range Maximum output is limited by transducer capability. Typical
values are:
Air:
-10 to 120-125 dB HL at 500-6000 Hz
Bone: -10 to 70-80 dB HL at 500-4000Hz.
External Inputs Talkover Dynamic or electret, for speech audiometry
Microphone: or patient communication.
Patient Mic.: Dynamic or electret.
CD/Tape1: Sensitivity 0.1 - 3.0 VRMS, 47 kOhm.
CD/Tape2: Sensitivity 0.1 - 3.0 VRMS, 47 kOhm.
Outputs Phones: Air Conduction.
Bone: Bone Conduction.
Insert: Insert Phone for masking.
Free Field: F.F Loudspeaker via external Amplifier.
Output Voltage:max. 3 Vrms.
Source Impedance:
500 Ohm.
Standard Functions Speech: Stimulus via Microphone or CD/Tape1.
Masking: White Noise, Speech Noise or external CD/Tape2.
Ipsi, Contra or Bin. S+M.
Tone Switch: Normal or Reverse operation.
Pure Tone: Manual or 1.5 sec. Tone Duration.
Pulsing Rate: User-programmable (Range: 1.5 to 3.5 Hz).
Warble: Frequency Modulation 3.7
$
5%.
Modulation Waveform: traingular.
Modulation Range: 5%.
L/R Shift: Automatic switching of all selected parameters
from left to right channel and vice versa.
HL Level Lock: Locking of masking level to stimulus level
at any preselected interval.
Tone Lock: On/off, internal tone switch synchronization.
Special Functions SISI Test: Display shows: Presentation counter, Patient Score
counter with current Score Percent constantly indicated.
Increments of 1 or 5 dB.
Interrupt/Reset function. Initiated by Tone Switch.
Fowler Test: Alternate Binaural Loudness Balance (ABLB) Test.
Stenger Test: Binaural Tone Stimulation.
Rainville Test: Bone Conduction Masking.
User Functions 5 user-programmable functions available for quick test retrieval.
User setups are stored in a non-volatile memory (EEPROM).
Display Alphanumeric Transflective LCD with CFL Backlighting.
2 rows of 40 characters with Cursor. Screen dimensions 155x16 mm.
þ MIDIMATE 622 OPERATION MANUAL Appendix A: Technical Specifications
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