Category: Communication Device for the Deaf Blind

Hearing Aid HD-424

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The Hearing Aid HD-424 is a behind the ear hearing aid designed for use by individuals who are deaf. Features include super power BTE, optimized DSP hearing aid, 2 channels WDRC multi memories amplifier, 12 bands frequency shaping. 10 bands layered noise reduction, low-level expansion, adaptive feedback cancellation AFC technology (advanced), widebrand MPO control, low battery warning, telecoil function, up to three programs, volume control, memory switch, telicoil function, H-Trimmer, L-Trimmer, P-Trimmer.

Technical Specifications: 


  • Peak OSPL 90(dB SPL): 140 dB
  • HFA OSPL 90(dB SPL): 133 dB
  • Peak Gain(dB): 75dB
  • HFA full on Gain(dB): 70 dB

Total Harmonic Distort:

  • 500Hz(%): 1.5
  • 800Hz(%): 1.0
  • 1600Hz(%): 1.0
  • EQ Input Noise(dB): 25
  • Battery Current(mA): 1.8

Power: 675 battery

Dimensions: 2 inches Height.


Price Check
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Hearing Aid HD-424

Made By:

Solar Ear
Organization Type: 

Solar Ear manufactures lower cost, solar powered hearing aids.