Artificial Limbs Manufacturing Corporation of India


Pocket Type Hearing Aid


Pocket Type Hearing Aid

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