2 adjectives to describe microphone

Not if I die stopping it!" A familiar voice, issuing from the lips of the fauna voice made natural and audible as the living human tones, by means of a delicate microphone attachment inside the bronze headtautened his nerves.

This consisted of a pair of rods to convey the sound vibrations to the ears, and does not at all resemble the modern electrical microphone.

2 adjectives to describe  microphone