LOUDSPEAKER

摘要

The present invention relates to a loudspeaker module (1) for high-quality vocal and musical reproduction, wherein said module includes a direct- radiation main electrodynamic head (2) for converting the electrical signal into an acoustic one in the medium portion at least of the sound frequency range. The module also includes an acoustic conformation body (3) of the hea d (2) whose diffuser (5) covers the opening on the outer surface of said body. The device also includes axial-symmetry sound reflectors (4) directed toward s the radiating opening of the main electrodynamic head (2) and mounted outsid e the acoustic conformation body (5) so as to be coaxial with the axis (6) of said main electrodynamic head (2). The following relations are also provided relations 0,5 RE<.DELTA.<0,25 .lambda.max, and SR = (1/3 ~ 4)SE where RE is the radius of the effective surface area of the radiating surface of the main electrodynamic head (2), .DELTA. is the distance between the radiating opening of the main electrodynamic head (2) and the sound reflector (4), .lambda.max is the maximal length in the air of the sound wave to be reproduced by the main electrodynamic head (2), SR is the surface area of th e sound reflector and SE is the effective surface area of the radiating surfac e of the main electrodynamic head (2). The device may further include a direct - radiation low-frequency electrodynamic head with a corresponding low-frequen cy radiation reflector as well as a high-frequency electrodynamic head.