microphone /mīˈkrə-fōn/

1. An instrument for intensifying sounds
2. A sensitive instrument (short form mike /mīk/), similar to a telephone transmitter, for picking up sound waves to be broadcast or amplified and translating them, eg by means of a diaphragm and carbon granules, into a fluctuating electric current

microphonic /-fonˈik/ adjective

• letterpress
• letterpresses
• letter quality
• letter-quality
• letters
• letters credential
• letterset
• lettersets
• letters of administration
• letters of comfort
• letters of credence
• letters of credit
• letters of horning
• letters of indication
• letters of intercommuning
• letters-of-marque
• Letters of peace
• Letters pacifical
• letters patent
• letters requisitory
• letters rogatory
• letter-stamp
• letter-stamps
• letter-weight
• letter-weights