High-resolution sound pickup

Abstract

The invention discloses a high-resolution sound pickup, which comprises a bottom plate, a first seat body, a second seat body, a rotary driving mechanism, a radial driving mechanism, an ultrasonic sound pickup head and a signal processing unit; the first seat body is provided with an accommodating circular groove in which magnetorheological fluid is stored; the second seat body is provided with a disc mounting circular groove; the disc mounting circular groove and the accommodating circular groove are coaxial; the rotary driving mechanism is used for driving the ultrasonic sound pickup head to rotate circumferentially; the radial driving mechanism is connected with the output end of the rotary driving mechanism and is used for driving the ultrasonic sound pickup head to move in the radial direction; the ultrasonic sound pickup head is used for generating a vertically upward magnetic field to enable the magnetorheological fluid to form a conical magnetorheological fluid stylus, and is used for sending out an ultrasonic signal, receiving an ultrasonic reflection signal and feeding back the received ultrasonic reflection signal to the signal processing unit; and vibration interference in the pickup process is avoided, the sound information reading precision is improved, the playing sound quality is better, and sound can be accurately restored.

Description

technical field [0001] The invention relates to the field of sound pickups, in particular to a high-resolution sound pickup. Background technique [0002] At present, vinyl records record the sound by recording the vibration wave pattern of the sound on the surface of the vinyl record in the form of a vortex line sound groove; The stylus with matching shape is clamped in the sound groove, the cross-section shape of the sound groove is V-shaped, and then the vinyl record is rotated at a fixed speed, the uneven plane on the wall of the sound groove drives the stylus in contact with it to vibrate, using The magnet or coil connected to the stylus cuts the magnetic induction line in the phono head to generate an induced current that changes with the vibration of the stylus, and the sound signal is obtained by amplifying the obtained induced current. [0003] In the above-mentioned existing sound reproduction methods, the stylus is in contact with the vinyl record, and as the sty...

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned existing sound reproduction methods, the stylus is in contact with the vinyl record, and as the stylus and the record wear, the sound resolution and texture will decrease, resulting in sound distortion; at the same time, the vibration noise of the stylus and the record itself is further aggravated The magnitude of this distortion is exceeded, making the sound impossible to be accurately restored.

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