A loudspeaker for music of the mobile phone includes a sound-transmitting tube with a bell mouth closed at one end and on the tube surface, and a retractable and rotatable externally-closed compensating tube inserted into the sound-transmitting tube, and a long groove-shaped corresponding socket at the relative place of the tube surface of the sound-transmitting tube and the compensating tube, and then the angle and position of the compensating tube are rotated and telescoped, so that a open is formed between two sockets of the sound-transmitting tube and the compensating tube for obliquely inserting the mobile phone with the appropriate width and thickness, so that the music sound played out from the bottom of the mobile phone can be more fully played out from the bell mouth via the sound-transmitting tube, and then the volume is larger, and the sound is warmer and richer.

A loudspeaker for music of the mobile phone includes a sound-transmitting tube with a bell mouth closed at one end and on the tube surface, and a retractable and rotatable externally-closed compensating tube inserted into the sound-transmitting tube, and a long groove-shaped corresponding socket at the relative place of the tube surface of the sound-transmitting tube and the compensating tube, and then the angle and position of the compensating tube are rotated and telescoped, so that a open is formed between two sockets of the sound-transmitting tube and the compensating tube for obliquely inserting the mobile phone with the appropriate width and thickness, so that the music sound played out from the bottom of the mobile phone can be more fully played out from the bell mouth via the sound-transmitting tube, and then the volume is larger, and the sound is warmer and richer.

Disclosed is a passive headset apparatus for directing sound coming from the front of a user into the user's ear and its external auditory canal without the use of batteries, speakers or electronics. In particular, it directs high frequency sound of about 500 Hz and up, directly into the canal, improving clarity for loss of hearing while shielding and muting sound from the sides of the ears. The external auditory canal follows two compound angles leading into the skull. This invention focuses sound into the angles of the external auditory canal using sound deflectors configured to direct sound at the correct angles.

Disclosed is a passive headset apparatus for directing sound coming from the front of a user into the user's ear and its external auditory canal without the use of batteries, speakers or electronics. In particular, it directs high frequency sound of about 500 Hz and up, directly into the canal, improving clarity for loss of hearing while shielding and muting sound from the sides of the ears. The external auditory canal follows two compound angles leading into the skull. This invention focuses sound into the angles of the external auditory canal using sound deflectors configured to direct sound at the correct angles.

An acoustic meta material (AMM) spiral device for passive amplification of sound is described. The AMM amplifier device employs at least one deep sub-wavelength spiral design with high refraction index, based on an exponential spiral shape. The AMM spiral amplifier is used to focus on low frequency sound amplification and to cover broadband frequency range. Sound emanating from a speaker travels into a spiral channel until reaching the apex of the spiral. When twin spirals are used, the sound then enters a second spiral for radiating into open air.

An acoustic meta material (AMM) spiral device for passive amplification of sound is described. The AMM amplifier device employs at least one deep sub-wavelength spiral design with high refraction index, based on an exponential spiral shape. The AMM spiral amplifier is used to focus on low frequency sound amplification and to cover broadband frequency range. Sound emanating from a speaker travels into a spiral channel until reaching the apex of the spiral. When twin spirals are used, the sound then enters a second spiral for radiating into open air.

A one-piece diaphragm and ring for a stethoscope chestpiece is disclosed herein. The one-piece diaphragm and ring includes a diaphragm portion having a flat disk shape; and a ring portion connected to an outer periphery of the diaphragm portion, the ring portion being integrally formed with the diaphragm portion, and the ring portion configured to be attached to a rim of a chestpiece body portion. A chestpiece of a stethoscope that includes the one-piece diaphragm and ring is also disclosed herein.

A mounting system is provided to allow the attachment of an acoustic collector to a handheld electronic device such that sound is conducted directly to the device's microphone. A fitted case or band encloses part of the device and includes a tube running from the collector to the device's microphone. In certain embodiments, the tube may be embedded in the case, and a detachable mount may be provided to connect the collector to the case. The collector may be a stethoscope chestpiece, or an open air collector, such as a parabolic collector.

A mounting system is provided to allow the attachment of an acoustic collector to a handheld electronic device such that sound is conducted directly to the device's microphone. A fitted case or band encloses part of the device and includes a tube running from the collector to the device's microphone. In certain embodiments, the tube may be embedded in the case, and a detachable mount may be provided to connect the collector to the case. The collector may be a stethoscope chestpiece, or an open air collector, such as a parabolic collector.

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.