Microphone comprising gas-measuring means and method for measuring gas by means of such a microphone
Microphone comprising at least one perforated rigid membrane and at least one flexible membrane placed at a distance from the rigid membrane so as to form an enclosure between the rigid membrane and the flexible membrane, the flexible membrane being suited to being displaced by a sound vibration of air outside of the microphone via the perforated rigid membrane, said microphone being characterised in that it comprises means for measuring the quantity of at least one gas, said means for measuring being mounted in the enclosure in order to measure at least one gas present in said enclosure.
1. A microphone comprising a perforated rigid membrane and a flexible membrane placed at a distance from the perforated rigid membrane so as to form an enclosure between the perforated rigid membrane and the flexible membrane, the flexible membrane being configured to being displaced by a sound vibration of air outside of the microphone via the perforated rigid membrane, said microphone comprises a metal oxide component mounted in the enclosure for measuring a quantity of gas, wherein the metal oxide component is sensitive to said at least one gas being measured, and wherein the metal oxide component forms the flexible membrane of the microphone.
2. The microphone according to claim 1 , in which the metal oxide component for measuring is mounted on the flexible membrane.
3. The microphone according to claim 1 , in which the metal oxide component for measuring is mounted on the rigid membrane.
4. The microphone according to claim 1 , in which the metal oxide component for measuring comprises at least one gas chromatograph.
5. An electronic device comprising a microphone for measuring noises and sounds and for measuring at least one gas in the air outside of the electronic device, said microphone comprising a perforated rigid membrane and a flexible membrane placed at a distance from the perforated rigid membrane so as to form an enclosure between the perforated rigid membrane and the flexible membrane, the flexible membrane being configured to being displaced by a sound vibration of air outside of the microphone via the perforated rigid membrane, said microphone comprises a metal oxide component mounted in the enclosure for measuring a quantity of gas, wherein the metal oxide component is sensitive to said at least one gas being measured, and wherein the metal oxide layer forms the flexible membrane of the microphone.
6. A method for measuring a level of gas in the air breathed out by a user, said method comprising:
a step of breathing out air by a user into a microphone, said microphone comprising:
a perforated rigid membrane and a flexible membrane placed at a distance from the perforated rigid membrane so as to form an enclosure between the perforated rigid membrane and the flexible membrane, the flexible membrane being configured to being displaced by a sound vibration of air outside of the microphone via the perforated rigid membrane, said microphone comprises a metal oxide component mounted in the enclosure for measuring a quantity of gas, wherein the metal oxide component is sensitive to said at least one gas being measured, and wherein the metal oxide layer forms the flexible membrane of the microphone;
a step of measuring the quantity of at least one gas in the air breathed out;
a step of determining, by the microphone, a volume of air breathed out by the user; and
a step of determining the level of the at least one gas measured in the air breathed out from said measured quantity of the gas and said determined volume of air breathed out.
7. The method according to the claim 6 , in which the volume of air breathed out is determined by measuring a pressure exerted by the air breathed out on the flexible membrane.
8. The method according to claim 6 , in which, the microphone being part of a telephone, the step of measuring the quantity of gas in the air breathed out is carried out during a telephone call of the user in order to measure the level of gas in the air breathed out by the user during said call.