A sensor system for a sub-surface system is disclosed, comprising a pressure sensor positioned in a first orientation; a gravity sensor arranged proximate to the pressure sensor, the gravity sensor detecting gravitational force on the pressure sensor relative to the first orientation; and a data acquisition system operatively connected to each of the pressure sensor and the gravity sensor, the data acquisition system determining a gravity compensated pressure value detected by the pressure sensor corrected for gravitational force on the pressure sensor relative to the first orientation.

A sensor system for a sub-surface system is disclosed, comprising a pressure sensor positioned in a first orientation; a gravity sensor arranged proximate to the pressure sensor, the gravity sensor detecting gravitational force on the pressure sensor relative to the first orientation; and a data acquisition system operatively connected to each of the pressure sensor and the gravity sensor, the data acquisition system determining a gravity compensated pressure value detected by the pressure sensor corrected for gravitational force on the pressure sensor relative to the first orientation.

A pressure gauge includes: a pressure sensor; a display unit configured to display a measurement value of the pressure sensor; and a measurement controller configured to set, as a measurement range of the pressure sensor, any of a plurality of measurement ranges defined by a lower limit value specific to the pressure sensor and respective upper limit values that are equal to or lower than an upper limit value specific to the pressure sensor and are different from each other, and to avoid that the display unit displays the measurement value when the measurement value exceeds a display upper limit value dependent on the upper limit value of the measurement range that is set.

A pressure gauge includes: a pressure sensor; a display unit configured to display a measurement value of the pressure sensor; and a measurement controller configured to set, as a measurement range of the pressure sensor, any of a plurality of measurement ranges defined by a lower limit value specific to the pressure sensor and respective upper limit values that are equal to or lower than an upper limit value specific to the pressure sensor and are different from each other, and to avoid that the display unit displays the measurement value when the measurement value exceeds a display upper limit value dependent on the upper limit value of the measurement range that is set.

An audio appliance includes a microphone transducer having an acoustically sensitive region to convert incident acoustic energy to a corresponding output signal and a barometric transducer having a pressure-responsive region to convert an ambient pressure to a corresponding output signal. The audio appliance also has an acoustic housing defining a chamber to fluidly couple the microphone transducer with the barometric transducer, together with a processor and a memory containing instructions. The instructions, when executed by the processor, cause the audio appliance to determine a presence or an absence of an ambient impairment to the microphone transducer based at least in part on the output signal from the barometric transducer. Responsive to a determined presence of an ambient impairment to the microphone transducer, the instructions, when executed by the processor, cause the audio appliance to mitigate effects of the ambient impairment.

An audio appliance includes a microphone transducer having an acoustically sensitive region to convert incident acoustic energy to a corresponding output signal and a barometric transducer having a pressure-responsive region to convert an ambient pressure to a corresponding output signal. The audio appliance also has an acoustic housing defining a chamber to fluidly couple the microphone transducer with the barometric transducer, together with a processor and a memory containing instructions. The instructions, when executed by the processor, cause the audio appliance to determine a presence or an absence of an ambient impairment to the microphone transducer based at least in part on the output signal from the barometric transducer. Responsive to a determined presence of an ambient impairment to the microphone transducer, the instructions, when executed by the processor, cause the audio appliance to mitigate effects of the ambient impairment.

A pressure sensor is provided, the sensor comprising an inlet for connecting to a body of gas; a diaphragm assembly comprising a first diaphragm and a second diaphragm, the first and second diaphragms defining a chamber therebetween, the chamber being connected to the inlet; a first transducer responsive to movement of the first diaphragm and operable to produce a first electrical signal in response to the same; and a second transducer responsive to movement of the second diaphragm and operable to produce a second electrical signal in response to the same; and an amplifier disposed in the chamber of the diaphragm assembly and connected to the first and second transducers to receive the first and second electrical signals therefrom. A movement sensor assembly for detecting movement of a person is also provided, the assembly comprising a flexible vessel containing a body of gas and a pressure sensor according to any preceding claim, the sensor being arranged to detect changes in the pressure of the gas within the flexible vessel.

A pressure sensor is provided, the sensor comprising an inlet for connecting to a body of gas; a diaphragm assembly comprising a first diaphragm and a second diaphragm, the first and second diaphragms defining a chamber therebetween, the chamber being connected to the inlet; a first transducer responsive to movement of the first diaphragm and operable to produce a first electrical signal in response to the same; and a second transducer responsive to movement of the second diaphragm and operable to produce a second electrical signal in response to the same; and an amplifier disposed in the chamber of the diaphragm assembly and connected to the first and second transducers to receive the first and second electrical signals therefrom. A movement sensor assembly for detecting movement of a person is also provided, the assembly comprising a flexible vessel containing a body of gas and a pressure sensor according to any preceding claim, the sensor being arranged to detect changes in the pressure of the gas within the flexible vessel.

A security system for a building comprises a pressure sensor and a computer system communicatively coupled with the pressure system. The pressure sensor coupled to a movable portion of a window in the building. The computer system is configured to: receive a first pressure measurement from the pressure sensor; compare the first pressure measurement to a reference pressure measurement; and based on the comparison, detect that the movable portion of the window has moved.

A security system for a building comprises a pressure sensor and a computer system communicatively coupled with the pressure system. The pressure sensor coupled to a movable portion of a window in the building. The computer system is configured to: receive a first pressure measurement from the pressure sensor; compare the first pressure measurement to a reference pressure measurement; and based on the comparison, detect that the movable portion of the window has moved.