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- Starts with a sound, then it changes acoustical energy into electrical energy, borrows energy from a battery, represents the sounds in 1s and 0s (digitization), applies mathematical concepts, changes back into analog signal, boosts up signal by borrowing more energy from the battery, changes that to an acoustic signal and then delivers to the ear canal
- Amplification is when sound are taken that occur naturally in the real world, borrows energy from an outside source (battery), changes it into electrical current (microphone) and makes it a digital signal, digitally manipulates the signal (processing algorithms), boosts it up (amplifier), changes it back to an acoustic signal (receiver) and sends the sound back to the person’s ear canal.
- A transducer is a technical term for any device that changes energy from one form to another. In terms of hearing aids, sound is changed from an acoustic signal to an electric one and back again to an acoustic signal.
- Batteries have three parts, an anode (-), a cathode (+), and the electrolyte. The cathode and anode (the positive and negative sides at either end of a traditional battery) are hooked up to an electrical circuit. The chemical reactions in the battery causes a build up of electrons at the anode.
- Battery capacity is a measure of the charge stored by the battery and is determined by the by the mass of active material contained in a battery.
- Same voltage for all batteries.
- Time (in hours) = Capacity (in mA hours) / drain (in mA)
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