Dynamic microphone

摘要

A microphone includes a polar piece contacting with a first magnetic pole of a first permanent magnet, a yoke body annularly arranged around the polar piece through a magnetic gap G with a predetermined width, a magnetic circuit unit including a tail yoke connected to the yoke body and contacting with a second magnetic pole of the first permanent magnet, and a diaphragm unit provided with a voice coil arranged to vibrate in the magnetic gap. The second magnetic pole of the first permanent magnet contacts with one side of the tail yoke, a first magnetic pole of the second permanent magnet is disposed to contact with other side of the tail yoke, a magnetic path is produced between the second magnetic pole of the second permanent magnet and the yoke body, and the first permanent magnet and the second permanent magnet are polarized in the same sense.

主权项

1. A dynamic microphone, comprising a polar piece which is in contact with a first magnetic pole of a first permanent magnet, a yoke body annularly arranged around said polar piece through a magnetic gap with a predetermined width, a magnetic circuit unit including a tail yoke which is connected to said yoke body and in contact with a second magnetic pole of said first permanent magnet, and a diaphragm unit provided with a voice coil arranged to vibrate in said magnetic gap, wherein the second magnetic pole of said first permanent magnet is in contact with one side of said tail yoke, a first magnetic pole of a second permanent magnet is disposed in contact with the other side of said tail yoke, and said first permanent magnet and said second permanent magnet are polarized in the same sense.