Solar Ear HD-424
The Solar Ear Hearing Aid HD-424 is a hearing aid that is charged with a solar powered battery charger.
The Solar Ear Hearing Aid HD-424 is a Behind-The-Ear (BTE) hearing instrument that is suitable for mild to severe hearing loss. The hearing aid uses rechargeable batteries that are charged with a solar powered battery charger.
The consumer price is 224USD, the distributor price is 40% less. Interview with representative
Goal 3: Good health and well-being
Hearing Aid HD-424 is manufactured by Solar Ear, formerly Deaftronics, in Botswana and in Brazil and China. The manufacturing sites are independently run, owned, and operated.Interview with representative Young deaf people are hired by Solar Ear and taught how to manufacture and assemble the hearing aids.
Solar Ear has national distributors in Botswana, Brazil, Canada, Chile, China, Egypt, Mexico, Nigeria, Pakistan, and the U.S.A. that can be contacted to purchase the HD-424 Hearing Aid. Customers residing in countries without a national distributor can fill out an online contact form to request a quote.
18,000 HD-424s have been distributed as of August 2017.
50,000 Solar Ear hearing aids, 100,000 solar chargers, and 250,000 rechargeable hearing aid batteries have been sold as of July 2017. Interview with representative
The most sound that the hearing aid will make with 90dB input
Average level of just the high frequencies with 90 dB input
Average full-on gain, which is defined as the gain control of the hearing aid set to its full-on position with an input SPL of 50 dB.Display order
How well the aid is able to reproduce sound clearly
Noise level output
Number of channels available for programming
Provides information to user on how long it will take for battery to die
Used to switch between multiple programs in order to optimize hearing aid for different environments
An additional setting on some hearing aids
The HD-424 is a rechargeable device suited for profound hearing loss.
– 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)
– Wideband MPO Control
– Low Battery Warning
– Telecoil function
– Up to three programs
The Solar Ear Hearing Aid Battery Charger can be charged via solar energy, household light, or a Nokia cell phone charger. The rechargeable batteries and solar battery charger can also be used with 95% of all Behind-The-Ear hearing aids on the market today. Used with a conventional earmold. Interview with representative
The listening programs must be set by a hearing healthcare professional or the manufacturer. Troubleshooting guidance is available in the user manual. All Solar Ear hearing aids and accessories come with a 2-year warranty.Interview with representative
Solar Ear will repair or fix any hearing aids or accessories during or beyond the warranty period for no additional charge. Solar Ear will also provide two rechargeable batteries for free upon request. Interview with representative
The rechargeable battery can withstand at least 500 cycles. The lifetime of the hearing aid is approximately five years.Interview with representative
Affordable hearing (below ~70 USD) , rechargeable hearing aid Interview with representative
Results from a clinical trial of a Solar Ear BTE hearing aid with 21 participants found that the hearing aid offers substantial benefit to the hearing impaired with a severe predominantly sensorineural hearing impairment (i.e >60 dB at 2 kHz) and gives amplification in the desired frequency range that is aligned with National Acoustic Laboratories (NAL) recommendations.
The HD-424 passed testing at Stanford University. Interview with representative
Stanford University, University of Copenhagen, Western Michigan University, Special Olympics International, Department of Audiology, Bispebjerg Hospital Interview with representative
Patients with middle ear infection should not wear the hearing aid until cured unless otherwise instructed.
Disposal Guidance: Return to audiologist where it was purchased. Upon the unit’s return to the manufacturer, they will renovate it and donate it to a school for the deaf. Interview with representative
Parving, A., Christensen, B., Nielsen, J., Konradsson, K., Clinical Trial of a Low-Cost High-Power Compression Hearing Aid, Department of Audiology, Bispebjerg Hospital H: S, 2400 Copenhagen NV, Denmark
Parving, A., Christensen, B., 2004, Clinical Trial of a Low-Cost, Solar-Powered Hearing Aid, Acta Otolaryngol, May, 124(4), pp. 416-20.
Fitting of the test-HA was based on the NAL-R prescription rule (2) or the POGO-rule (11) depending on the degree of the subject´s HI and all the fittings were validated by insertion gain measurements, using a Siemens Unity-IG equipment. The immediate benefit of the test- HA was measured by the difference in speech recognition scores without and with the test-HA in quiet (SRS) and in background noise (S/N=5 dB)( SRSN). After a 6-8 week trial period the person met for follow-up and completion of a structured interview based on the IOI-HA (3,4). The IOI-HA form includes 7 questions with responses according to a graded scale 1-5, where 5 is the maximum score. At the end of the session the subject should make a preference for the test-HA or the previously fitted HA named HA-AA.
In context photographs (0)
You can use the form below to contribute a photo of this product.
In context files & documents (0)
Feedback from users, customers & distributors
Please let us know your experience in using this product through comments below.