Then he suddenly spun the chair around, pushed the concealed button on his desk which activated a microphone concealed in the cigar humidor, and told his secretary to get the senator on the telephone just as quickly as she could.

West brought the microphone concealed in his left palm to his lips.

Filming was done entirely on location, and the performances by the actors used in the spot were recorded live on set by miniature microphones concealed in their costume.

A microphone concealed in the tunnel had conveyed their shibboleths before them.

The primitive sound technology ruled, mandating that all the action - though that defames the term - occur within a few feet of a microphone concealed in a proverbial flowerpot in the center of the scene.

The crew members did not adjust their positions for the test, relying on the sensitive microphones concealed in their shirt collars to pick up any sound.

Bonner set his recorder to play back and stood near the crew chief, while the miniature microphone concealed in Benjamin Steward's shirt collar picked up the lengthy address.

The title automatically invokes all the unauthorized recordings Mr. Richter has inspired: disks on obscure labels that often sound as if they had been made using microphones concealed in overcoats, perhaps by the devoted fans who have tracked this eccentric, reclusive artist from obscure hall to obscure hall.