A bamboo amplifier and holder is described. In some examples, the bamboo amplifier and holder can include a bamboo tube, a device slot, one or more charging slots, a rechargeable battery and a mechanism to support the bamboo tube. The device slot is configured to receive a device and the bamboo tube is configured to amplify the sound emitted and/or generated by the device. The charging slots are each configured to accommodate a charging port. The device can be charged when connected to the rechargeable battery. Also, the rechargeable battery can be charged when connected to an external power source. These connections can be via one or more charging ports.

A speaker case for a mobile device with a speaker. A protective shell into which the mobile device can be inserted. The protective shell has a rear wall and at least one side wall with an opening for the speaker, a plate-shaped component, which is fastened to the protective shell so as to pivot about a first pivot axis. At least one second plate-shaped component which is pivotally mounted about a second pivot axis on the first plate-shaped component. The pivot axes are preferably perpendicular to each other and whereby the protective shell has a sound channel from the opening for the speaker to the rear wall of the protective shell.

A speaker case for a mobile device with a speaker. A protective shell into which the mobile device can be inserted. The protective shell has a rear wall and at least one side wall with an opening for the speaker, a plate-shaped component, which is fastened to the protective shell so as to pivot about a first pivot axis. At least one second plate-shaped component which is pivotally mounted about a second pivot axis on the first plate-shaped component. The pivot axes are preferably perpendicular to each other and whereby the protective shell has a sound channel from the opening for the speaker to the rear wall of the protective shell.

An improved ultrasonic lens and associated system is provided. Specifically, there is provided an ultrasonic lens with two sets of parallel sound ports operatively connected to an electrodynamic transducer to extend the working range of both audible and ultrasonic sound signals. The ultrasonic lens and electrodynamic transducer are situated so that the electrodynamic transducer axis and the sound port axes are aligned, whereby a shift in either the x or y axis direction will influence the ultrasound and audible behavior of the sound signal from the electrodynamic transducer.

A method, system, apparatus, and/or device for capturing sounds from an appendage and/or organ of a body. The method, system, apparatus, and/or device may include a bell configured to capture a low-frequency vibration from a surface of a body. The bell may include a first base having a first diameter, a first tapered portion extending upwardly from the first base and tapering inwardly, a first top portion having a second diameter and connected to a top of the first tapered portion, and a first channel extending from the first tapered portion to the hollow portion of the first tapered portion. The first base, the first tapered portion, and the first top portion may form an elongated cone shape.

A method, system, apparatus, and/or device for capturing sounds from an appendage and/or organ of a body. The method, system, apparatus, and/or device may include a bell configured to capture a low-frequency vibration from a surface of a body. The bell may include a first base having a first diameter, a first tapered portion extending upwardly from the first base and tapering inwardly, a first top portion having a second diameter and connected to a top of the first tapered portion, and a first channel extending from the first tapered portion to the hollow portion of the first tapered portion. The first base, the first tapered portion, and the first top portion may form an elongated cone shape.

An example sonar transducer assembly is provided including at least one transducer element and a flexible printed circuit board (PCB) including at least one set of electrical connections for the at least one transducer element. The electrical connections include flex tabs configured to flex out of a PCB plane. The sonar transducer assembly also includes a support structure including an aperture for the at least one transducer element. The support structure is configured to support the body of the PCB, allow flexion of the flex tabs into the aperture, and retain the at least one transducer element in the at least one aperture. The transducer element is installed in a direction that is perpendicular to the PCB plane causing the flex tabs to flex outwardly from the PCB plane, thereby creating an elastic force of the flex tabs applied against opposing ends of the at least one transducer element.

The present invention envisages a harmonica holder for releaseably holding and amplifying the sound of the harmonica. The harmonica holder comprises a holder portion for releasably holding a harmonica, wherein the holder portion includes a pair of holder plates having a means to selectively hold and release the harmonica; and a horn portion extending from the holder portion, wherein one end of the horn portion is connected to the holder portion such that the sound emitted from the harmonica travels thru the horn portion, thereby getting amplified, the horn portion having a bell-like configuration and airholes configured thereon.

The present invention envisages a harmonica holder for releaseably holding and amplifying the sound of the harmonica. The harmonica holder comprises a holder portion for releasably holding a harmonica, wherein the holder portion includes a pair of holder plates having a means to selectively hold and release the harmonica; and a horn portion extending from the holder portion, wherein one end of the horn portion is connected to the holder portion such that the sound emitted from the harmonica travels thru the horn portion, thereby getting amplified, the horn portion having a bell-like configuration and airholes configured thereon.

The invention discloses a novel passive sound transformer, either a sound-booster or a sound-silencer, embodied as an acoustic waveguide, a specific shape of which provides for either amplifying the intensity of acoustic waves at the expense of both the heat energy and the concomitant turbulence of moving fluid wherein the amplified intensity of the acoustic waves is manifested as sound loudness boosting or, contrarywise, transforming the wave power of elastic waves into the heat of the ambient fluid.