A metamaterial comprising, a plurality of acoustic vector field sensors, each configured to sense an acoustic vector field of a fluid within a fluid-filled space in response to fluid waves, and producing an electrical signal corresponding to the sensed acoustic vector field; a processor configured to perform a time and space transform on the electrical signal; and at least one phased array transducer, configured to emit fluid waves according to a produced acoustic vector field pattern dependent on a result of the time and space transform, a within a portion of the fluid.

A metamaterial comprising, a plurality of acoustic vector field sensors, each configured to sense an acoustic vector field of a fluid within a fluid-filled space in response to fluid waves, and producing an electrical signal corresponding to the sensed acoustic vector field; a processor configured to perform a time and space transform on the electrical signal; and at least one phased array transducer, configured to emit fluid waves according to a produced acoustic vector field pattern dependent on a result of the time and space transform, a within a portion of the fluid.

Systems for magnetoacoustically transferring sound across an acoustic barrier include first and second acoustic resonators positioned on opposite sides of the barrier. Each of the first and second resonators includes an attached magnet. Via magnetic coupling between the magnets, an acoustic oscillation at the first resonator induces an oscillation of the same frequency at the second resonator. Thus sound waves absorbed at the first resonator are magnetically transferred across the barrier to the second resonator, from which they are emitted.

An adjustable hearing protection device is provided for arranging in or on the ear. The hearing protection device includes a housing with an acoustic entrance opening, an insertion part for inserting into an auditory canal of the ear extending from the housing with an acoustic exit opening oriented toward the interior of the auditory canal, and adjusting means for adjusting the hearing protection device to one of at least two acoustic adjustment positions. Each acoustic adjustment position sets one of a number of acoustic couplings between the entrance opening and the exit opening.

An adjustable hearing protection device is provided for arranging in or on the ear. The hearing protection device includes a housing with an acoustic entrance opening, an insertion part for inserting into an auditory canal of the ear extending from the housing with an acoustic exit opening oriented toward the interior of the auditory canal, and adjusting means for adjusting the hearing protection device to one of at least two acoustic adjustment positions. Each acoustic adjustment position sets one of a number of acoustic couplings between the entrance opening and the exit opening.

First data comprising a first range of audio frequencies is received. The first range of audio frequencies corresponds to a predetermined cochlear region of a listener. Second data comprising a second range of audio frequencies is also received. Third data comprising a first modulated range of audio frequencies is acquired. The third data is acquired by modulating the first range of audio frequencies according to a stimulation protocol that is configured to provide neural stimulation of a brain of the listener. The second data and the third data are arranged to generate an audio composition from the second data and the third data.

First data comprising a first range of audio frequencies is received. The first range of audio frequencies corresponds to a predetermined cochlear region of a listener. Second data comprising a second range of audio frequencies is also received. Third data comprising a first modulated range of audio frequencies is acquired. The third data is acquired by modulating the first range of audio frequencies according to a stimulation protocol that is configured to provide neural stimulation of a brain of the listener. The second data and the third data are arranged to generate an audio composition from the second data and the third data.

A method includes displaying a first media information affordance representing a first media item in response to detecting an indication that a physical proximity between an electronic device and an external device satisfies a proximity condition. The electronic device receives a first input representing selection of the first media information affordance. In response to receiving the first input: in accordance with a determination that the first input is a first type of input, a process to playback the first media item is initiated; and in accordance with a determination that the first input is a second type of input different from the first type of input, a second media information affordance representing the first media item is displayed.

A method includes displaying a first media information affordance representing a first media item in response to detecting an indication that a physical proximity between an electronic device and an external device satisfies a proximity condition. The electronic device receives a first input representing selection of the first media information affordance. In response to receiving the first input: in accordance with a determination that the first input is a first type of input, a process to playback the first media item is initiated; and in accordance with a determination that the first input is a second type of input different from the first type of input, a second media information affordance representing the first media item is displayed.

A multi-audio stethoscope head comprising a head body (1) including a sound collecting surface (11), a vibrating diaphragm, and a fastener. The sound collecting surface (11) is provided with a sound guiding hole (16), and the fastener (3) is provided with an axial through hole (33), a fastener sidewall (31) for attaching to the head body (1), and a diaphragm pressing portion (32) for tightly attaching the vibrating diaphragm (2) to the head body (1). The vibrating diaphragm (2) is disposed between the diaphragm pressing portion (32) and the head body (1). Protruding poles (6) protruding toward the vibrating diaphragm (2) is arranged on the sound collecting surface (11) at the radially inner side of the through hole (33), and when the vibrating diaphragm (2) is not subject to external pressure, the vibrating diaphragm (2) is spaced from the protruding poles (6).