Preset Test Protocols - Interacoustics OtoRead Operation Manual

PROCESSOR SPECIFICATIONS
Digital Signal Processor: Motorola 56303 24-bit 66 MHz 3.3 V
Storage: 2 Mbit Flash EEPROM (non-volatile)
Battery Backup: 0.1F 5.0 V (approx. 24 hours)
CODEC: 18 bit D/A, 18 bit A/D 96 dB SNR typical
Display: 4 line x 10 character STN liquid crystal
Switches: Membrane keypad 1 million + actuation
MAXIMUM SPL
The maximum sound pressure level output of this instrument
remains well below 90 dB SPL throughout the audible frequency
range of 20 Hz to 20 kHz. This level is well within OSHA
permissible limits of 90 dBA for 8 hours.
Conforms to IEC 601-1.
SYSTEM SPECIFICATIONS
Microphone Frequency Response (Nominal) System Noise Floor
(Nominal)
DPOAE
Number of Frequencies Tested = 4
Frequency Range = 2 kHz to 5 kHz
P1 (Intensity of F1 in dB SPL) = 65
P2 (Intensity of F2 in dB SPL) = 55
Averaging Time = 4 seconds
Pass SNR (Signal-to-Noise Ratio) = 6 dB
Number of Passing Frequencies for Overall Test Pass = 3
TEOAE
Number of Frequencies Tested = 6
Frequency Range = 1.5 kHz to 4 kHz
Averaging Time = 64 seconds
Pass SNR (Signal-to-Noise Ratio) = 4 dB
Number of Passing Frequencies for Overall Test Pass = 3
OtoRead Screener

Preset Test Protocols

Technical Specification Page 43