| 摘要 |
TELEPHONE CONFERENCING APPARATUS A telephone conferencing apparatus has a speaker and a microphone in a common housing, at opposite ends thereof and on a common axis, the speaker and microphone facing in opposite directions. The peripheral distance between centre lines of speaker and michrophone around housing is about 15" for good acoustic separation. The microphone is surrounded by an inclined surface, at an angle of about 30.degree., the surface inclined from the microphone toward the speaker end of the housing. The microphone inlet is positioned at about 1/2" from a surface, which can be the surface of a base member spaced from the microphone. A resonator can be attached to the microphone inlet. - i |
