Device for measuring sound level
First Claim
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1. A device for measuring sound level, comprising:
- an inlet opening;
a MEMS microphone for measuring sound level; and
an external acoustic attenuator with a pressure divider comprising;
a first branch between the inlet opening and the membrane of the MEMS microphone via an inlet channel and a resonant cavity; and
a second branch between the resonant cavity and a vent chamber via a vent channel,wherein the pressure divider comprises a dumping material layer mounted between the inlet opening of the external acoustic attenuator and the resonant cavity, wherein the resonant cavity splits to the inlet channel and a vent channel coupled with a vent chamber.
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Abstract
A device for measuring sound level, comprising: an inlet opening; a MEMS microphone for measuring sound level; and an external acoustic attenuator with a pressure divider comprising: a first branch between the inlet opening and the membrane of the MEMS microphone via an inlet channel and a resonant cavity; and a second branch between the resonant cavity and a vent chamber via a vent channel.
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11 Claims
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1. A device for measuring sound level, comprising:
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an inlet opening; a MEMS microphone for measuring sound level; and an external acoustic attenuator with a pressure divider comprising; a first branch between the inlet opening and the membrane of the MEMS microphone via an inlet channel and a resonant cavity; and a second branch between the resonant cavity and a vent chamber via a vent channel, wherein the pressure divider comprises a dumping material layer mounted between the inlet opening of the external acoustic attenuator and the resonant cavity, wherein the resonant cavity splits to the inlet channel and a vent channel coupled with a vent chamber. - View Dependent Claims (2, 3, 4, 5)
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6. A device for measuring sound level, comprising:
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an inlet opening; a MEMS microphone for measuring sound level; and an external acoustic attenuator with a pressure divider comprising; a first branch between the inlet opening and the membrane of the MEMS microphone via an inlet channel and a resonant cavity; and a second branch between the resonant cavity and a vent chamber via a vent channel, wherein the components of the device are positioned in a tight housing in the following order;
an inlet opening of the inlet channel, a sealing set, the pressure divider, the resonant cavity, a PCB with the MEMS microphone, the vent chamber and a PCB with connector for coupling the device with external devices. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification