Coaxial loudspeaker with horn and shape optimization method therefor
AssigneeSuzhou Sonavox Electronics Co., Ltd.
InventorsMingwei Lu, Guoqiang Chai, Renfang Xu, Xiafeng Xue
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Abstract
A coaxial loudspeaker with a horn and a shape optimization method therefor are provided. The coaxial loudspeaker includes: a woofer unit; a tweeter unit; and a horn having an inner cavity, an open upper end and an open lower end. The tweeter unit comprises a high-pitch cone, the horn surrounds the high-pitch cone, a lower end portion of the horn is connected to the tweeter unit, and an upper end portion of the horn has the largest inner diameter.
Claims15
A coaxial loudspeaker comprising:
- a woofer unit;
- a tweeter unit;
- and
- a horn having an inner cavity, an open upper end, and an open lower end,
- wherein the tweeter unit comprises:
- a high-pitch cone, the horn surrounding the high-pitch cone, a lower end portion of the horn being connected to the tweeter unit, and an upper end portion of the horn having a largest inner diameter;
- a seat, arranged on the woofer unit, the high-pitch cone being arranged on the seat, and the lower end portion of the horn being connected to the seat and/or an outer peripheral edge of the high-pitch cone;
- a high-pitch voice coil;
- and
- a plurality of soldering terminals for transmitting an audio signal to the high-pitch voice coil, an upper portion of each of the plurality of soldering terminals being embedded in the seat and in contact and communicated with an inputting end of the high-pitch voice coil, and the plurality of soldering terminals being electrically connected to a signal inputting line for inputting the audio signal.
A shape optimization method for a coaxial loudspeaker with a horn, comprising the following steps:
- S1, establishing a geometric model of the coaxial loudspeaker, and obtaining control nodes in a contour curve of the horn;
- wherein the coaxial loudspeaker comprises:
- a woofer unit;
- a tweeter unit;
- and
- a horn having an inner cavity, an open upper end and an open lower end, and
- wherein the tweeter unit comprises a high-pitch cone, the horn surrounds the high-pitch cone, a lower end portion of the horn is connected to the tweeter unit, and an upper end portion of the horn has a largest inner diameter;
- S2, setting a physical field;
- S3, defining material parameters;
- S4, dividing a mesh;
- S5, optimizing geometric parameters of a contour shape of the horn;
- and
- S6, drawing an optimized geometric model of the horn according to optimized parameters,
- wherein step S5 comprises:
- S51, selecting optimization parameters:
- taking coordinate values P of a group of control nodes in the contour curve of the horn as the optimization parameters;
- S52, setting constraints:
- limiting value range C of coordinate values P to:
- C={P:lb≤P≤ub}
- where lb is a lower limit of the coordinate values P, and ub is an upper limit of the coordinate values P;
- S53, determining optimization objective:
- taking a maximum value of a sum of high-frequency average sound pressure level responses SPL0 and SPLθ of the coaxial loudspeaker at 0° on axis and off-axis θ angles, that is, satisfying:
- P
- ⋁
- =
- max
- ︸
- P
- (
- SPL
- 0
- _
- +
- SPL
- θ
- _
- )
- where P̌ is a set of optimization parameters that satisfy the optimization objective and
- max
- ︸
- P
- is an operator to serve un maximum value;
- and
- S54, optimizing calculation:
- according to the coordinate values P and the constraint, using an optimization algorithm to calculate the set of optimization parameters P̌ that satisfy the optimization objective
- max
- ︸
- P
- (
- SPL
- 0
- _
- +
- SPL
- θ
- _
- )
- .
Dependencies are inferred from the claim text.