Directional sensors for head-mounted contact microphones
First Claim
1. A unidirectional piezoelectric sensor comprising two piezoelectric acoustic elements, each element comprising two flat surfaces, a more sensitive surface and a less sensitive surface with respect to mechanical stimulation, wherein the sensor is produced by electrically and mechanically connecting a surface from each of the two polymeric piezoelectric acoustic elements to each other.
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Abstract
Directional piezoelectric devices and methods for their manufacture are provided that improve the quality of piezoelectric device mediated signal detection and provide new thermal imaging devices. The devices can provide over an order of magnitude improved signal to noise ratio compared with previously known devices. The devices may be used along with new head mounted acoustic technologies for improved voice communication systems in inherently noisy environments. The head mounted technologies utilize microphones that are activated by pressure wherein the applied trigger pressure further serves to improve efficiency of the microphones. Also provided are head pieces that include both microphones and speakers that are particularly useful for harsh environments such as those encountered by fire fighters. The head pieces are capable of further functions related to contact with the head of the user, such as reporting physiological variables of the user, along with oral communications.
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Citations
39 Claims
- 1. A unidirectional piezoelectric sensor comprising two piezoelectric acoustic elements, each element comprising two flat surfaces, a more sensitive surface and a less sensitive surface with respect to mechanical stimulation, wherein the sensor is produced by electrically and mechanically connecting a surface from each of the two polymeric piezoelectric acoustic elements to each other.
- 21. A contact microphone, comprising a microphone and a push to talk switch that is capable of being pressed when the microphone is pressed against a user such that sounds emanating from the user are effectively transmitted to the microphone.
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32. A thin talk/listen head piece for an adult user comprising:
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a flat material that simultaneously cover the user'"'"'s ear and the sagital arc anterior to the user'"'"'s ear;
a speaker within the flat material;
a microphone within the flat material and located anterior to the speaker; and
a push to talk switch positioned above or near the microphone such that manual activation of the switch will exert pressure onto the microphone, increasing contact pressure or forces between the microphone and underlying skin. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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Specification