76 results about "Voice amplifier" patented technology

A case is for a mobile device. The mobile device case comprises a body, a pop-up plate, an outer support plate, an inner support plate, wedge-shape bellow sound amplifier, first magnets, and a spring device. The pop-up plate has an edge hinged to a portion of the body so as to cover the cut-out opening of the body. The inner support plate is provided on an inner surface of the base groove so as to cover the cut-out opening, and the inner support plate comprises sound-guiding holes for guiding sound from the mobile device into a gap inside. The wedge-shape bellow sound amplifier is provided between the outer support plate and the inner support plate configured for amplifying the sound through the one or more sound-guiding holes from the mobile device.

A voice amplifier for attachment to a mask has a sound reflector that faces outwardly of the mask when the voice amplifier is attached to the mask. A speaker faces inwards towards the sound reflector. Sound waves emanate from the speaker inward towards the sound reflector, reflect off the sound reflector and exit the voice amplifier through an outer peripheral gap and travel outwardly from the mask. The voice amplifier has an on/off switch mounted on the front of the voice amplifier. The voice amplifier cover has a front wall with a front surface facing away from the mask. The narrow end of the speaker is located closer to the front wall of the cover than the wide end. The cover front wall follows the profile of the speaker in a direction from the narrow end to the wide end of the speaker.

A sound amplifier is provided in the form of a sound amplification cone with a front panel opposite a rear panel and spaced apart by side panels. The side panels fold so that the front panel and rear panel can collapse together or be deployed apart. The sound amplification cone is hinged to a tab which is held at least partially within a case. The case also holds a smart device therein. A slot in the case allows for the tab and sound amplification cone to slide into and out of the case when the cone is collapsed. When the sound amplification cone is slid out of the case and deployed, a port of the sound amplification cone is located adjacent speakers of the smart device to amplify sound therefrom. Auxiliary speakers and a power source can also be provided within the tab or sound amplification cone for further sound amplification.

A remote controller having an echo function is disclosed, which comprises an echo circuit which includes an echo IC and an echo volume switch, with the echo IC being designed to amplify and circulate voice signals for generating echo, and with the echo circuit being connected with the microphone driving unit, the voice amplifier and the mixer circuit, respectively. In the remote controller, a user's voice and an external sound from an audio apparatus are outputted based on an echo effect when a user practices language or singing.

The loudspeaker system of the invention comprises at least one enclosure, at least one fastener, a sound amplifier unit, at least one speaker unit, at least one power supply unit, and an audio signal connector. The enclosure comprises a bottom face which is contoured to fit the shoulder strap of a backpack. Each of the fasteners is connected to each of the enclosures. The fasteners are used for fastening the enclosures on the shoulder straps. The sound amplifier unit is electrically connected to the speaker units, the power supply unit and the audio signal connector. The sound amplifier unit is contained in one of the enclosures. Each of the speaker units is contained in each of the enclosures. The at least one power supply unit is contained in the at least one enclosures. The audio signal connector can be electrically connected to an external audio rendering device.

The invention is suitable for the field of alarming devices and provides a disaster detection alarming device and an alarming method thereof; the disaster detection alarming device comprises a sensor, and further comprises a singlechip connected with the sensor, a voice storage chip which is connected with the singlechip and is stored with various voice contents, a voice amplifier connected with the voice storage chip, a loudspeaker connected with the voice amplifier, a power supply processing circuit which is used for processing the power supply of internal power supply or external power supply and providing the power supply for the singlechip, the voice storage chip, the voice amplifier and the sensor; the singlechip carries out self diagnosis to the inner part of the disaster detection alarming device, when the diagnosis condition meets the alarming condition, the voice storage chip is controlled to output the corresponding voice content. The disaster detection alarming device has the function of state self diagnosis and utilizes the prestored voice and warning voice to carry out alarming or working state prompting, so as to guide people to adopt proper dealing measures timely and reduce or prevent casualty loss.

A sound control circuit in a display device includes a microcomputer for generating variable signals corresponding to the amount changed in duty cycle of pulse width modulation output when a sound function key is selected. A sound amplifier control circuit is for controlling sound output through a speaker based on control signals such as voice signal output level and sound mute generated by the microcomputer. A sound output unit generates sound after changing input sound based on the output signal generated by the sound amplifier control circuit. A multiplexer turns on a light emitting diode and switching a microphone according to the control signal generated by the microcomputer.

The present invention relates to an abnormal sound preventing module and the sound amplification device, which are used to prevent the sound amplification device from generating abnormal sounds when a power supply is turned off. The sound amplification device comprises a sound amplifier, a sound processor, an abnormal sound preventing module and a loudspeaker, wherein the sound processor is coupled to a first working voltage, and the sound amplifier is coupled to a second working voltage. When a power supply is turned off, the abnormal sound preventing module outputs static sound control signals to the sound amplifier according to the voltage difference between the first working voltage and the second working voltage. The sound amplifier can avoid that the loudspeaker generates abnormal sounds according to static sound control signals.

The invention discloses an anti-radiation device for a smart phone. The device comprises an outer shell, a sound box is fixedly mounted in the upper end wall of the outer shell; an anti-radiation boxis arranged in the outer shell; an anti-radiation cavity is formed in the anti-radiation box; an opening of the anti-radiation cavity is upward; a back storage power supply located in the outer shellis arranged below the anti-radiation cavity; the device can be used for placing a mobile phone to shield mobile phone radiation before sleep; meanwhile, children can be prevented from not sleeping touse the mobile phone for a long time; parents can use scale passwords to prevent children from stealing and opening the device at night, a charging assembly is further arranged in the anti-radiation cavity of the device, a mobile phone can be charged while being placed in the anti-radiation box, meanwhile, a sound amplifier is further arranged in the device and makes a ring through a loudspeaker,a user is prevented from oversleeping, and the device is easy to operate and wide in user range.

According to one embodiment, a terminal apparatus includes a processor which amplifies a reception voice signal to transmit it to the voice input/output device by a voice amplifier capable of arbitrary setting an amplification gain and amplifies a transmission voice signal transmitted from the voice input/output device by the voice amplifier, a memory which stores a communication level setting value corresponding to registered name information showing the voice input/output device, an acquiring unit which acquires the registered name information from the voice input/output device through a radio communication in connecting the voice input/output device, and a controller which reads out a communication level setting value corresponding to the acquired registered name information from the memory, and controls the amplification gain of the voice amplifier based on the communication level setting value.

An instrument amplifier includes an amplifier circuit for amplifying a sound signal input from an electric guitar. A main speaker emits sound according to the sound signal being amplified. A CD player plays back an audio signal from an audio CD. Side speakers for playback emits audio sound according to the audio signal being played back. A speaker box contains the main speaker and the side speakers in one space. In one embodiment, the speaker box includes a rear panel for closing a space behind the main speaker and the side speakers. Furthermore, an output mode key is settable in a first mode by external operation, the first mode being for controlling the playback speaker to emit sound according to the sound signal. The side speakers are disposed beside one another, for stereo sound emission of the audio sound.

The invention adds a hearing aid function to the small portable frequency modulation (FM) radio. The FM radio is a super-heterodyne receiver composed by a FM broadcasting waves (RF), amplifiers, a local oscillator (OSC), a mixer, an IF amplifier, a detector, a voice amplifier (AF), headphones and speakers. To add a hearing aid function to the small portable frequency modulation radio, a FM radio as shown in the abstract figure is manufacturered. A built-in speaker is used as a dynamic microphone (1) for picking up voice signals. In addition, a pre-microphone amplifier (25) is increased, to enlarge the voices picked-up by the microphone. Herein, the high-frequency gain of the audio is inhibited, to reduce the listening barriers caused by the external noise of the frequency. The radio and hearing aids functions are selected by a function switching (20), the selected signal is output to the headphone (27) through the voice amplifier (26) of the original radio, accordingly hearing the voices.

An electronic device caddy includes a first tray portion an end cage and a second tray portion also including an end cage. A passive sound amplifier is associated with one end cage. A locking mechanism is also featured. A mounting bracket is attached rearward of one tray portion.

A preconditioning acoustic equalization device adds an adjustor before the alignment circuit of the equalization setting device. The adjustor has a frequency control circuit, a signal generator circuit, a radio-voltage amplifier circuit, and a microphone, wherein, the radio-voltage amplifier circuit is connected with a comparison circuit and a display circuit and adjustment circuit, and the frequency control circuit is provided with a frequency reference and a plurality of dividing frequencies. The preconditioning acoustic equalization method includes: adjusting the audio by the adjuster before playing back the audio, each frequency transmits a frequency reference standard point signal and reference point signals of each dividing frequency through the signal generator circuit, the sound amplifier and the horn broadcasting the signals, the microphone receiving the signal voices at the listening point, a comparison circuit comparing the strength of the obtained signals with the standard value to display by the display circuit, the alignment circuit modulating the signals so that the strength of the signals of each dividing frequency point is equal to that of the standard point, and finally playing the music after completing the correction capable of correcting the acoustics frequency spectrum distortion problem caused by the audio equipment and space.

This device is an add-on component to an existing keyless entry system that will play a pre-recorded sound from a speaker/amplifier system mounted underneath the hood of a motor vehicle. Installable interchangeable sound cards are provided to give the device the ability to play different sounds. A digital sound amplifier is activated by the radio frequency of the automobiles factory installed keyless entry system. This is a novelty item and does not interfere with the cars existing systems.