A new manufacturing method and acoustic analysis technology combine to control unwanted resonances, enabling the reproduction of sound that is more true to the original.
|R&D category||Car Navigation System|
|Purpose, feature or effect of the R&D||Multimedia|
A new manufacturing method and an original acoustic analysis technology have come together in the development of a B4C*1 high sound quality speaker diaphragm. Our new manufacturing method realizes the world's highest propagation velocity*2 among B4C speaker diaphragms, and our acoustic analysis technology has boosted performance. Unwanted resonances are normally unavoidable in speaker diaphragms, but the new diaphragm realizes reproduction that is more true to the original, with no resonances even in the high-frequency range.
A new atmospheric pressure ceramic sintering method*3 developed in a joint project with Mino Ceramic Co., Ltd. and the National Institute of Advanced Industrial Science and Technology (AIST) is employed in the formation of the B4C diaphragms with high density.
The new manufacturing method realizes levels of propagation velocity and internal loss approaching theoretical values. At 12,700m/sec, the diaphragm achieves the world's highest propagation velocity for a B4C speaker diagram.
An acoustic analysis technology enabling prediction of sound dispersion and sound pressure for each frequency under study was applied in the development of the new speaker diaphragm. This enabled the realization of an optimal shape that would boost the performance of the B4C.