ETS Praxis Audiology Practice Test

Which hearing-aid input transducer is specifically sensitive to electromagnetic energy?

Omnidirectional Microphone Directional Microphone Telecoil Internal Receiver

Correct Answer:

Telecoil

Explanation:

Telecoil is the hearing-aid input transducer that responds to magnetic fields. It’s essentially a small induction coil inside the aid that converts electromagnetic energy from loop systems or telephone handsets into an electrical signal the device can process. This magnetic coupling sets it apart from microphones, which pick up acoustic sound waves, and from the internal receiver, which is the output transducer that sends sound into the ear. So, the telecoil is specifically sensitive to electromagnetic energy.

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