Includes many of the attractive features of the MI-5000B:
- Built in talk over with automatic pause while in use
- Serial port for external communication
- Excellent immunity to low line voltages
- Rugged construction
- Small, lightweight, portable
- Allows for field calibration of output levels
- Three frequency threshold averaging on printouts
- Capability for switching from automatic to manual as needed
- Options to start either ear and whether to test 8 kHz.
- 'Listening' test controlled by the patient response switch
from inside the booth
- Elapsed test time printed on test results
- Flags on printout show which thresholds were determined
manually
- Error messages displayed on the screen in easily understood
terms
- Pause and Resume capability
- Compatible with numerous hearing conservation software
packages
- Complies with OSHA test requirements and qualifies as a
microprocessor audiometer
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Plus additional features:
- Fast, quiet built in printer
- Test storage capability
- Battery-backed time and date clock
- Time and date of test printed on test results
- Selected patient demographics printed on test results
- Wide operating voltage range, automatically adapts to
both domestic and foreign supply
- Numeric keypad for additional demographic/data entry
- Menu selection for setting programmable options that
allow:
- Changing operator certification number (printed on
test)
- Using the operator certification number
- Using date of birth, gender, type of test and other
demographics
- Using pulsed or continuous tone stimulus
- Printing a test automatically after completion
- Pausing and alarming on certain error conditions
- Setting the RS-232 output format
- RS-232 data string compatible with either MI-5000 or
MI-6000 format
- Adjustable audible alert for end of test and error
conditions
Quick printout of all current audiometer settings
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Specifications:
Test
Frequencies: 500, 1000, 2000, 3000, 4000, and 6000 Hz. 8000 Hz is optional.
Frequency
Accuracy: Crystal controlled, less than 1% error at all frequencies.
Frequency
Sequence: Start either ear, 1000, 500, 1000 retest, 2000, 3000, 4000, 6000,
(optional 8000). Second ear, 500, 1000, 2000, 3000, 4000, 6000 (and 8000
optional).
Intensity
Range: From 0 dB to 90 dB Hearing Level (HL) in 5 dB steps.
Attenuator
Linearity: Less than 0.75 dB error for any 5 dB step, less than 1 dB error for
any 10 dB step, less than 2 dB accumulated error relative to the calibration
level.
Tone
Rise/Fall Times: 44/32 ms typical.
Test Paradigm: Modified Hugheson Westlake in the automatic mode with fully
manual override capability.
Testing Time:
On a cooperative individual or a biological simulator, approximately 5 ½ minutes
(testing 8 kHz.).
Stimulus
Characteristics
A - Pulse train is 1.2 seconds with 50% duty cycle (200 ms on and 200 ms off)
with three pulsed tone presentations.
B - Time between pulse train is varied randomly between 1 and 2 seconds.
C - Patient response window is 1.8 seconds from the beginning of the pulse
train.
D - Pulse train terminates when response switch is depressed.
Error
Warnings: Audible alert (when active) with visual display of specific error
encountered. The following error conditions are detected and signaled.
A - Threshold not established at 1000 Hz, first ear.
B - Retest failure at 1000 Hz.
C - Patient responding when no tone is being presented.
D - Switch not released.
E - Failure to establish threshold within allotted time (pause and alert
optional at this error).
Audiometer Calibration: All audiometer calibration parameters will meet ANSI
S3.6 1996 Standard for Audiometers and OSHA 29 CFR 1910.95. Output levels are
calibrated through secured keyboard entry.
Safety: Unit
is powered by Safety Extra Low Voltage (SELV) input from a UL listed detachable
power supply.
Earphone:
Telephonics Corporation TDH -49 earphones with MX-41/AR cushions.
Power
Requirements: 100-240 VAC, 47-63 Hz, 1A
Physical
Dimensions 3" high, 9.5" wide, 11.5" deep. Requires 3" of space in rear of unit
for paper roll.
Net Weight:
Unit, 5 lbs; Earphone, 1 lb; Power Supply, 1 lb.
Standard Equipment:
MI-7000
Audiometer with Printer
Earphone Assembly
Patient Response Switch
Power Supply
AC Power Cord
Patch Cords (2)
Paper Roll (2)
Operator Manual
