Patent ID: 7110743

Claim:
A communication device for use with a protective helmet having a headband, the device comprising: a bone conductor microphone, and a support to which the microphone is mounted and which is configured for releasable mounting on the headband, wherein the support positions the microphone between an inner surface of the headband and a user's head, and in contact with a user's head, when the device is mounted on the headband, and wherein the headband is adjustable and comprises: a ratchet sleeve, wherein the support is configured to releasably mount on the ratchet sleeve and position the microphone between the ratchet sleeve and the user's head, the ratchet sleeve being configured for tightening and loosening the adjustable headband, wherein tightening the headband increases pressure on the microphone, and loosening the headband decreases pressure on the microphone, the pressure on the microphone being created by forces exerted between the headband and the user's head.