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Wheel Chair Hub
6 inch Exel length
1 inch Thread & 40 Holes
  HEARING AID

Available in three models.

  1. Mild.
  2. Moderate.
  3. Strong.

SPECIAL FEATURES:

  • All models are available in single ( Monoural ) as well as Double ( Binaural ) Cord.
  • All silicon 4 B.J.T. ( Bipolor Junction Transistor) circuitry used.
  • Fitted with 3rd Generation Electret Condenser Microphone.
  • Provision for Volume Control.
  • High & Low Tone selection Switch provided.
  • Main Body of Hearing aid injection moulded out of grade ‘A’ABS (Acrylonitrile Butadine Styrene).
  • Oprated on 1.5 volt AA/R-6 size battery (Pencil Cell).

TECHNICAL SPECIFICATIONS:

PARMETERS MILD MODERATE STRONG
a)Maximum saturation Sound Pressure Level (SSPL) 115dB 125dB 135dB
b) Average OSPL 90 105-114 dB 115-124 dB 125-134 dB
c) Full on acoustic gain (min.) 45 dB 65 dB 65 dB
d) HF-average Full on Gain (min.) 40 dB 50dB 60 dB
e) Frequency range 250 Hz – 3150 Hz 250 Hz – 3150 Hz 250 Hz – 3150 Hz
f) Effect on the Full on Acoustic gain of variation of battery voltage (1.5V to 1.0V) Less than 10dB Less than 10dB Less than 10dB
g) Total Harmonic Distortion at 1.5 V Less than 7% Less than 7% Less than 7%
h) Effect of Variation of battery voltage on distortion at 1.0V Less than 10% Less than 10% Less than 10%
i) Internal noise from the hearing aid in terms of equivalent input noise level Less than 30dB SPL Less than 30dB SPL Less than 30dB SPL
j) Battery Current Less than 5 mA Less than 10 mA Less than 15 mA
k) Nominal Battery Voltage 1.5V 1.5V 1.5V

 

 

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