Traditional Chinese Practical Listening, hearing aids: Circuit Design, Parts List & Workshop Prototype Guide
In short: Traditional Chinese Practical Listening, hearing aids. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 1624 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
listening, hearing aidsCurrently, the hearing aids on the market are of great help to deaf people. However, when listening to the radio playback, it is somewhat inconvenient because it also comes with a radio. If the pocket radio is simply improved so that it can listen to the radio and be used as a hearing aid, it will be more convenient for users.Listening and hearing aids are modified based on the above ideas. Its basic working principle is to use the speaker of the radio as the microphone of the hearing aid, and use 8Ω earplugs for listening. The specific wiring may vary slightly depending on the radio wiring.Figure 149-1 shows part of the circuit of a typical radio, which can be converted into a radio hearing aid with a double-pole double-throw switch. alt="214.jpg (38992 bytes)">Figure 149-1 …
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