Various embodiments of an acoustic tube and a hearing device system that includes an acoustic tube are disclosed. The acoustic tube includes a body, a lumen disposed within the body that extends along a lumen axis between a first end and a second end of the body, and a magnetic coupler disposed adjacent to the first end and adapted to connect the acoustic tube to a housing of a hearing device. The acoustic tube further includes an outlet disposed adjacent to the first end and acoustically connected to the lumen, where the outlet is adapted to be acoustically connected to a microphone of the hearing device; and an inlet disposed adjacent to the second end and acoustically connected to the lumen. The acoustic tube is adapted to direct acoustic energy received by the inlet through the lumen and the outlet to the microphone of the hearing device.

Various embodiments of an acoustic tube and a hearing device system that includes an acoustic tube are disclosed. The acoustic tube includes a body, a lumen disposed within the body that extends along a lumen axis between a first end and a second end of the body, and a magnetic coupler disposed adjacent to the first end and adapted to connect the acoustic tube to a housing of a hearing device. The acoustic tube further includes an outlet disposed adjacent to the first end and acoustically connected to the lumen, where the outlet is adapted to be acoustically connected to a microphone of the hearing device; and an inlet disposed adjacent to the second end and acoustically connected to the lumen. The acoustic tube is adapted to direct acoustic energy received by the inlet through the lumen and the outlet to the microphone of the hearing device.

An intake sound introducing apparatus has, for example, a branch pipe, a sound creator, a communication pipe, and a resonator. The branch pipe branches from an intake pipe of the engine. The sound creator includes a vibrator that vibrates with the intake pulsation of the intake sound propagating within the branch pipe. The communication pipe provides communication between the inside of a casing of the sound creator and the inside of the cabin. The resonator is provided in the communication pipe.

An intake sound introducing apparatus has, for example, a branch pipe, a sound creator, a communication pipe, and a resonator. The branch pipe branches from an intake pipe of the engine. The sound creator includes a vibrator that vibrates with the intake pulsation of the intake sound propagating within the branch pipe. The communication pipe provides communication between the inside of a casing of the sound creator and the inside of the cabin. The resonator is provided in the communication pipe.

A system for controlling a sound level of a prime mover permitted to emanate from or within a vehicle includes a global positioning satellite (GPS) receiver operable for receiving a GPS signal and a sound control device. The sound control device is operable for increasing or decreasing a sound level of the prime mover in response to a control signal. A controller in communication with the GPS receiver includes a calendar and clock, and is programmed to execute a method, including receiving the GPS signal via the GPS receiver, and determining an actual location of the vehicle using the GPS signal. The controller also determines an actual date and time of day using the calendar and the clock, respectively, and transmits the control signal to the sound control device to increase or decrease the sound level using at least one of the actual location, date, and time of day.

A flexible waveguide band is provided for that may be worn by a user around their neck, for example. The flexible waveguide band includes a spine, such as a pliable rod; a plurality of vertebrae mounted on the spine, with each vertebra including at least one waveguide channel guide; and an encapsulating potting material. The flexible waveguide band may also be attached to an acoustic pod, including an acoustic driver that may radiate sound waves into said waveguide channels and exit via a sound outlet opening in the flexible band.

A flexible waveguide band is provided for that may be worn by a user around their neck, for example. The flexible waveguide band includes a spine, such as a pliable rod; a plurality of vertebrae mounted on the spine, with each vertebra including at least one waveguide channel guide; and an encapsulating potting material. The flexible waveguide band may also be attached to an acoustic pod, including an acoustic driver that may radiate sound waves into said waveguide channels and exit via a sound outlet opening in the flexible band.

A hybrid sensor assembly is configured to be mounted on a vehicle to sense structure borne and airborne noises generated as the vehicle travels over the roads. The sensor assembly includes a housing having a circuit board mounted therein, an accelerometer mounted on the circuit board, a microphone mounted on the circuit board, an acoustic port through the housing and in communication with the microphone, and an acoustic fabric attached to the housing over the port. An acoustic shield covers the acoustic port and substantially deters the entry of fluid and debris into the acoustic port.

A propeller system for an aircraft includes an assembly for modifying a sound field of the propeller system. The propeller system includes a rotor supported for rotation about a rotor axis. The rotor has a central hub and a plurality of blades each extending outwardly from the hub to a tip. The rotor and blades are operable to propel an aircraft to travel in a direction. The rotor blades define a rotor plane perpendicular to the rotor axis. The blade tips define a circumferential rotational path as the blades are rotated by the rotor. The propeller system includes an acoustic resonator or multiple resonators having openings disposed within a distance to the propeller blade tip that is small compared to the wavelength of the propeller's fundamental blade tone and proximate to the rotor plane. The resonators are excited by tip flow of the blade as it passes the opening. The acoustic resonators are configured and positioned so as to direct acoustic energy to modify the sound field of the propeller system at blade pass or higher harmonic frequency tones in a desired direction relative to the aircraft.

A propeller system for an aircraft includes an assembly for modifying a sound field of the propeller system. The propeller system includes a rotor supported for rotation about a rotor axis. The rotor has a central hub and a plurality of blades each extending outwardly from the hub to a tip. The rotor and blades are operable to propel an aircraft to travel in a direction. The rotor blades define a rotor plane perpendicular to the rotor axis. The blade tips define a circumferential rotational path as the blades are rotated by the rotor. The propeller system includes an acoustic resonator or multiple resonators having openings disposed within a distance to the propeller blade tip that is small compared to the wavelength of the propeller's fundamental blade tone and proximate to the rotor plane. The resonators are excited by tip flow of the blade as it passes the opening. The acoustic resonators are configured and positioned so as to direct acoustic energy to modify the sound field of the propeller system at blade pass or higher harmonic frequency tones in a desired direction relative to the aircraft.