Pocket Type Hearing Aid
SPECIAL FEATURES
- All models are available in Single (Monoural) as well as Double (Binaural) Cord.
- All silicon 4 B.J.T. (Bipolar Junction Transistor ) Circuitry used.
- Fitted with 3rd Generation Electret Condenser Microphone
- Provision for Volume Control.
- High & Low selection Switch provided.
- Main Body of Hearing aid injection moulded out of grade 'A' ABS (Acrylonitrile Butadine Styrene).
- 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 |
