Abstract: An airborne noise reduction device includes a fixed-volume container having two opposing flat ends and two opposing symmetrical non-flat sides; an inlet port configured to face into a first room; an outlet port configured to face into a return air system; a diverter centrally mounted within an inside chamber to the two opposing flat ends of the fixed-volume container; and acoustic insulative material affixed to surfaces of the two opposing flat ends, the two opposing symmetrical non-flat sides, and the diverter within the inside chamber, wherein a combination of a geometry of the fixed-volume container and an absorption coefficient of the acoustic insulative material is configured to reduce an apparent sound index value of a sound source emanating from a second room connected to the return air system and received into the first room.

Abstract: An airborne noise reduction device includes a fixed-volume container having two opposing flat ends and two opposing symmetrical non-flat sides; an inlet port configured to face into a first room; an outlet port configured to face into a return air system; a diverter centrally mounted within an inside chamber to the two opposing flat ends of the fixed-volume container; and acoustic insulative material affixed to surfaces of the two opposing flat ends, the two opposing symmetrical non-flat sides, and the diverter within the inside chamber, wherein a combination of a geometry of the fixed-volume container and an absorption coefficient of the acoustic insulative material is configured to reduce an apparent sound index value of a sound source emanating from a second room connected to the return air system and received into the first room.

Abstract: A fire extinguisher includes one or more sound waves fire extinguishers. Additionally, the fire extinguisher includes processing circuitry configured to receive output from one or more sensors, determine if a fire related event is detected based on the output from the one or more sensors, and activate the one or more sound waves fire extinguishers in response to detection of the fire related event to minimize the fire related event via mechanical pressure waves.

Abstract: A fire extinguisher includes one or more sound waves fire extinguishers. Additionally, the fire extinguisher includes processing circuitry configured to receive output from one or more sensors, determine if a fire related event is detected based on the output from the one or more sensors, and activate the one or more sound waves fire extinguishers in response to detection of the fire related event to minimize the fire related event via mechanical pressure waves.