Pocket Type Hearing Aid

 

SPECIAL FEATURES

 

1. All models are available in Single (Monoural) as well as Double (Binaural) Cord.
2. All silicon 4 B.J.T. (Bipolar Junction Transistor ) Circuitry used.
3. Fitted with 3rd Generation Electret Condenser Microphone
4. Provision for Volume Control.
5. High & Low selection Switch provided.
6. Main Body of Hearing aid injection moulded out of grade 'A' ABS (Acrylonitrile Butadine Styrene).
7. Operates on 1.5 Volt AA/R-6 size battery (Pencil Cell).

 

 

TECHNICAL SPECIFICATION :

PARAMETERS	MILD	MODERATE	STRONG
Maximum Saturation Sound Pressure Level (SSPL)	115dB	125dB	135dB
Average OSPL 90	105-114 dB	115-124 dB	125-134 dB
Full on acoustic gain (min.)	45 dB	55 dB	65 dB
HF-average Full on Gain (min.)	40 dB	50 dB	60 dB
Frequency range	250 Hz-3150 Hz	250 Hz-3150 Hz	250 Hz-3150 Hz
Effect on the Full on Acoustic gain of variation of battery voltage (1.5V to 1.0V)	less than 10 dB	less than 10 dB	less than 10 dB
Total Harmonic Distortion at 1.5V	less than 7%	less than 7%	less than 7%
Effect of variation of battery voltage on distortion at 1.0 V	less than 10%	less than 10%	less than 10%
Internal noise from the hearing aid in terms of equivalent input noise level	less than 30 dB SPL	less than 30 dB SPL	less than 30 dB SPL
Battery Current	less than 5 mA	less than 5 mA	less than 5 mA
Nominal Battery Voltage	1.5V	1.5V	1.5V