ADMP801
Obsolete
Analog Devices has sold its MEMS Microphone product line to InvenSense. Please visit the InvenSense ADMP801 product page for all technical support and...
Datasheet
ADMP801 on Analog.com
Are you looking to use a microphone to pick up vibrations in bone, such as through the skull bone? For this sort of application, you would want to have the microphone's sound port tightly-coupled (acoustically) to the vibrations in the bone. The microphone's sound port should probably be sealed against the skin, probably surrounded with a small gasket. The gasket will slightly increase the volume of air in front of the microphone and will probably provide a better-matched acoustic impedance at the boundary, compared to the microphone pressed against the skin with no air cavity.
Are you looking to use a microphone to pick up vibrations in bone, such as through the skull bone? For this sort of application, you would want to have the microphone's sound port tightly-coupled (acoustically) to the vibrations in the bone. The microphone's sound port should probably be sealed against the skin, probably surrounded with a small gasket. The gasket will slightly increase the volume of air in front of the microphone and will probably provide a better-matched acoustic impedance at the boundary, compared to the microphone pressed against the skin with no air cavity.