Principle, manufacturing method and application of Tai Ji lyre
A technology of yin and yang plates, applied to stringed instruments, instruments, musical instruments, etc.
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[0025] A. Material selection: Let the outer diameter of the piano tube be Φ 1 =96mm, tube length L 1 =136mm, the positive plate can be epoxy glass cloth laminated board with a thickness of 0.5-0.7mm, or a phenolic cotton cloth laminated board with a thickness of 0.8-1mm, or use two layers of 0.3mm thick epoxy glass cloth The laminated board is sandwiched with silk cloth and glued to form a laminated board with a thickness of about 0.7 mm. The negative membrane is selected from Guangzhou Guoguang brand multimedia speaker diaphragm, the speaker model is LF77RZ2604G12NPT8S13CDB, the working frequency is 200-15000HZ, and can be used to make full-band erhu. The diaphragm of this type of speaker is a funnel-shaped paper cone, the diameter of the horn port is 77mm, and the diameter of the funnel port is 13mm. Diaphragms from other similar speakers from other manufacturers can also be used. The sound tube can be made of copy paper or kraft paper, and canned aluminum skin can also b...
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