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General| Masking | Narrowband, speech noise, white noise |
|---|---|
| Display | LCD screen |
| Type | Audiometer |
| Frequencies | 125 Hz to 8000 Hz |
| Intensity Range | -10 dB to 120 dB |
| Transducers | insert earphones |
| Tests | speech audiometry |
| Parameters | Frequency, intensity, masking |
| Dimensions | 300 mm x 250 mm x 100 mm |
Overview of the GSI 61 as a microprocessor-controlled, two-channel audiometer for clinical use.
Procedures for inspecting the instrument upon receipt and safely removing it from its packaging.
Lists and illustrates the standard accessories included with the GSI 61 audiometer.
Detailed description of rear, left side, and right side panel connectors and controls.
Explanation of the functions and operation of the GSI 61's front panel controls and displays.
Details on signal formats, valid stimulus combinations, and transducer output selection.
Explanation of output routing options and the function of tone bars and interrupt buttons.
Description of the different display modes: Status and Audiogram.
Details on dB HL limits and valid frequency ranges for various transducers.
Procedures for installing the GSI 61 in single or two-room environments.
Instructions for installing basic and high-performance speakers for sound field testing.
Essential checks before operation and guidance on instructing patients for testing.
Standard procedures for pure tone threshold audiometry, including familiarization and threshold determination.
Detailed steps for Spondaic Speech Testing (SRT) and Speech Discrimination (PB Words).
Procedure to assess recruitment by comparing loudness growth in both ears.
Procedure to detect small intensity increments, useful for identifying cochlear pathology.
Guidance on performing audiometric tests in the high frequency range (8-20 kHz).
Steps for unaided and aided hearing aid tests, including SRT and discrimination.
Procedure to assess auditory adaptation and temporary threshold drift in response to pure tones.
Determines perceived loudness of tones when introduced simultaneously into both ears.
Essential checks for cords, hum, noise, and distortion to ensure instrument health.
Provides SPL values for pure tones and noise for various transducers for calibration.
Explanation of common error messages like 'CAL' and 'Help' and troubleshooting steps.
Details on configuring RS 232 and USB interfaces for remote control and data transfer.
Explanation of hardware and software flow control mechanisms for data transmission.
Detailed structure and fields for various input and output data records.
Procedures for validating and processing input commands from a remote device.
Describes various output record types for data transfer, including error and status information.
Alphabetical lists of spondaic words used for Speech Reception Threshold testing.
Lists of words used for Speech Discrimination testing (W-22).
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