68results about How to "Guaranteed sound" patented technology

The invention discloses an assembled bass drum, which comprises a drum frame and a drumhead arranged on the drum frame, the drumhead and the drum frame are both components, and the drumhead component and the drum frame component are connected and fixed through connecting parts; The drum frame assembly is composed of several unit parts connected by connecting parts 。 The present invention adopts detachable drum head assembly, drum frame assembly ， It not only maintains the appearance, sound quality and timbre characteristics of the original traditional bass drum, but also has the advantages of quick disassembly, convenient transportation, easy maintenance and storage.

The invention provides a guitar chord fingering device. The guitar chord fingering device comprises a shell, a frame, a plurality of electromagnetic devices, string contact pressers and an electrical control unit, wherein the shell is provided with chord keys; the frame is fixedly arranged in the shell; the electromagnetic devices are fixedly arranged on the frame; each electromagnetic device corresponds to a different pitch of each string of a guitar; the string contact pressers are driven by the electromagnetic devices; the chord keys are electrically connected with the electrical control unit; and the electrical control unit controls the electromagnetic device at the corresponding pitch to move according to a chord fingering spectrum corresponding to the chord keys so as to drive the string contact pressers to press strings. The invention also provides the guitar provided with the guitar chord fingering device. The guitar chord fingering device and the guitar have the advantages of good universality, simple structure and capability of avoiding interference among parts in various chord processes.

The invention relates to a joint type dulcimer playing robot. The robot comprises shoulder joints, elbow joints, wrist joints, large arms, small arms, waist motors, waist speed reducers and transposition gear pairs, wherein the shoulder joints, the elbow joints and the wrist joints are symmetrically mounted on the left side and the right side; the waist motors on same sides drive shoulder bases to rotate by the aid of the waist speed reducers and the transposition gear pairs; the waist motors and the waist speed reducers are mounted on shoulder support frames on same sides; the waist motors rotate to drive the large arms on same sides to rotate; elbow bases of the elbow joints are connected with the large arms on same sides by the aid of sheet metal parts; elbow support frames are fixedly connected with the small arms on same sides by the aid of sheet metal parts; elbow steering engines rotate to drive the small arms to rotate; the small arms are connected with wrist bases of the wrist joints on same sides; bamboo hammer clamping seats are fixed on output shafts of wrist steering engines; dulcimer bamboo hammers are mounted in the bamboo hammer clamping seats; and the wrist steering engines drive the bamboo hammer clamping seats to drive the dulcimer bamboo hammers to reciprocate up and down so as to realize actions of playing and knocking dulcimer keys. The robot is personified in appearance, convenient to control, large in direct movement range, small in noise and good in playing quality.

Provided is an acoustic device for attachment to any one of a plucked string instrument, a wiped string instrument, and a strike string instrument. The sound device (10) comprises a vibration mechanism (11), a base part (12), a string pressing part (13), a through hole (14), a string hanging part (15), a displacement mechanism (18) and fine adjustment mechanisms (21, 22). The string hanging part (15) comprises a rod part (16) and an extending part (17). The string hanging part (15) is positioned at a position separated from the soundboard (1) by the displacement mechanism (18), and the extending part (17) is in a state of hanging the string (4). And elastic force is generated on the strings (4), and the vibrator (31) is slightly pressed on the string bridge (3) through the action of a third type of lever. If excessive pressure is caused by strong tension of the strings (4), the pressure is adjusted to a proper value by fine adjustment mechanisms (21, 22).

The embodiment of the invention discloses a device configuration method, device, device and storage medium. The method includes: determining the target equalizer parameter range according to the target use distance of the device to be configured, and the mapping relationship between the candidate use distance and the candidate equalizer parameter range; wherein, the candidate equalizer parameter range is based on the candidate equalizer parameter range Determining using the speech response rate under the distance; according to the audio playback characteristics of the device to be configured, determining the target equalizer parameter value of the device to be configured within the target equalizer parameter range. The embodiment of the present invention improves the audio playback effect of the device by evaluating the voice response rate of the smart device on the premise of satisfying the voice response rate, provides a guarantee for the sound effect of the smart device, and compares the voice response rate and the audio playback effect under internal noise The two reach the best balance point.

A ukulele includes a ukulele main body and a circuit board. The ukulele main body includes a head, strings, a fret board, and a body. A front surface of the body is provided with a saddle and a bridge. The circuit board is disposed in the body. The circuit board includes a power supply module, a Bluetooth audio input module, a pickup module, a mixing module, and an audio output module. The ukulele can be played in conjunction with a smart phone accompaniment and ensure the timbre of playing.

The invention provides a direct drive global roof type loudspeaker, which includes a loudspeaker magnetic circuit structure which could generate a circle belt shaped radial permanent magnetic field, and a convex global roof shaped sound film and a corrugated rim connected therewith. The invention is characterized in that a wire-wound speech coil is directly formed on the sound film surface which is on the connection of the sound film global roof and the corrugated rim. Technically the speech coil is a lead for coating the insulating layer, and the speech coil can be directly coiled on the connection, or a pre-coiled coil which is directly fixed on the connection. Particularly, when the chose sound film is a textile sound film, the coil could be a lead for coating the insulating layer, which is weaved on the connection in the mode similar to sewing, thereby strengthening the integration of the sound film and the speech coil. The loudspeaker has the advantages of flat membrane type direct drive wide frequency response, free material-choosing of the global roof type sound film, graceful timbre, and wire-wound speech coil with small volume, high efficiency and uniform magnetic field or the like.