Microphone shield system
View Patent ↗A microphone shield system captures sound in adverse conditions. The system includes a microphone positioned within a membrane. The membrane is inflated around the microphone to form an enclosure. The inflated membrane passes signals within a selected frequency range. The membrane may block or attenuate signals above and/or below the frequency range to pass a desired sound with little surrounding interference.
1. A microphone shield system comprising:
a membrane inflated by an inflation pressure forming a microphone enclosure, where the inflated pressure exceeds an atmospheric pressure;
a seal coupled to the membrane; and
a microphone positioned within the microphone enclosure.
2. The microphone shield system of claim 1 , where the inflation pressure is greater than or equal to an expected air turbulence pressure.
3. The microphone shield system of claim 1 , where the membrane is configured to function as a bandpass filter.
4. The microphone shield system of claim 1 , where the inflation pressure is a tailored inflation pressure selected based on a desired frequency range to be passed by the membrane.
5. The microphone shield system of claim 1 , where the membrane is configured to function as a frequency bandpass filter that passes about 300 Hz to about 3,400 Hz.
6. The microphone shield system of claim 1 , further comprising a foam layer positioned above the membrane.
7. The microphone shield system of claim 6 , where the foal layer comprises an open cell foam.
8. A method for constructing a microphone shield system, the method comprising:
providing a microphone;
inflating a membrane to an inflation pressure to form a microphone enclosure that surrounds the microphone; and
sealing the microphone enclosure.
9. The method of claim 8 , where the inflation pressure exceeds an atmospheric pressure.
10. The method of claim 8 , where the inflation pressure exceeds an expected air turbulence pressure.
11. The method of claim 8 , where inflating the membrane comprises inflating the membrane to function as a bandpass filter.
12. The method of claim 11 , further comprising selecting the inflation pressure based on a desired frequency range to be passed by the membrane.
13. The method of claim 8 , where inflating the membrane comprises inflating the membrane to function as a bandpass filter that passes about 300 Hz to about 2,400 Hz.
14. The method of claim 8 , further comprising providing a foam layer that surrounds the membrane.
15. The method of claim 14 , where the foam layer comprises an open cell foam.
16. The method of claim 8 , where sealing the microphone enclosure comprises connecting a seal to the membrane.
17. A microphone shield system comprising:
a membrane inflated by an inflation pressure forming a microphone enclosure, where the inflated pressure exceeds an expected air turbulence pressure;
a seal coupled to the membrane; and
a microphone positioned within the microphone enclosure.
18. The microphone shield system of claim 17 , where the inflation pressure is greater than an atmospheric pressure.
19. The microphone shield system of claim 17 , where the membrane is configured to function as a bandpass filter.
20. The microphone shield system of claim 17 , where the inflation pressure is a tailored inflation pressure selected based on a desired frequency range to be passed by the membrane.
21. The microphone shield system of claim 17 , where the membrane is configured to function as a frequency bandpass filter that passes about 300 Hz to about 3,400 Hz.
22. The microphone shield system of claim 17 , further comprising a foam layer positioned above the membrane.
23. The microphone shield system of claim 17 , where the foam layer comprises an open cell foam.