Age-related hearing loss is known as a chronic condition seen in 226 million people over the age of 65 all over the world, and since there is no cure for this hearing loss, the use of hearing device is a common tool to rehabilitate individuals and improve their quality of life. Based on this need, Physics Engineering senior students whose names are Bahattin Ahmet Bedirhandede, Boron Zoroğlu and Muhammet Demirkan made low-cost hearing device designed to produce an amplified sound for people with hearing loss. In the construction of the device, an integrated circuit consisting of 3 transistors, 2 capacitors, 4 resistors and 1 thermistor was used. As a working principle, sounds coming from the environment are taken with a microphone with preamplifier, transformed into electrical signals and then amplified and these electrical signals can be used as a telephone headset by converting them back to sound. Making a statement due to the completion of the project, the students said “The human hearing system can usually hear sounds in the frequency range between 20 Hz and 20 kHz. However, the frequency range from 100 Hz to 6 kHz contains most of the information about the human voice. Hearing loss is caused by the failure of the central hearing system to function normally and is mostly seen in people who are insensitive to sound in the speech frequency range“. They said that “with this device we made, the sound quality can be increased for people having hearing loss”. The students also gave information about the solar-powered charger and the lighting system working with Tesla coil, provided also by their graduation projects.
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