Abstract: Certain aspects of the present disclosure provide an apparatus. The apparatus comprises a support structure comprising at least one microphone sensor, and a first material layer disposed adjacent to the support structure, wherein a first layer of air is formed between the first material layer and the support structure, the first layer of air being adjacent to the microphone sensor. In certain aspects, multiple material layers may be used, each of the material layers forming a layer of air. For instance, the apparatus may also include a second material layer disposed adjacent to the first material layer, wherein a second layer of air is formed between the first material layer and the second material layer.

Abstract: Certain aspects of the present disclosure provide an apparatus. The apparatus comprises a support structure comprising at least one microphone sensor, and a first material layer disposed adjacent to the support structure, wherein a first layer of air is formed between the first material layer and the support structure, the first layer of air being adjacent to the microphone sensor. In certain aspects, multiple material layers may be used, each of the material layers forming a layer of air. For instance, the apparatus may also include a second material layer disposed adjacent to the first material layer, wherein a second layer of air is formed between the first material layer and the second material layer.

Abstract: An acoustic pressure reducer acoustically couples to and provides acoustic impedance to attenuate the acoustic box pressure of an acoustic system, such as a loudspeaker system. The pressure reducer may also allow an ambient pressure of the acoustic system to equalize with an ambient pressure of an external environment and the ambient pressure of the acoustic pressure reducer at a certain rate. The attenuation may allow for inexpensive acoustic sensors to be utilized within the pressure reducer to measure one or more acoustic properties of an attenuated acoustic pressure within the pressure reducer. An unattenuated acoustic pressure value of the acoustic system may be estimated using a known transfer function of the pressure reducer and the attenuated acoustic pressure values measured within. A controller coupled to the acoustic system may adjust one or more operating characteristics in response to estimating the unattenuated acoustic pressure.

Abstract: An acoustic pressure reducer acoustically couples to and provides acoustic impedance to attenuate the acoustic box pressure of an acoustic system, such as a loudspeaker system. The pressure reducer may also allow an ambient pressure of the acoustic system to equalize with an ambient pressure of an external environment and the ambient pressure of the acoustic pressure reducer at a certain rate. The attenuation may allow for inexpensive acoustic sensors to be utilized within the pressure reducer to measure one or more acoustic properties of an attenuated acoustic pressure within the pressure reducer. An unattenuated acoustic pressure value of the acoustic system may be estimated using a known transfer function of the pressure reducer and the attenuated acoustic pressure values measured within. A controller coupled to the acoustic system may adjust one or more operating characteristics in response to estimating the unattenuated acoustic pressure.