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Loudspeaker driver

An acoustic radiator, motion technology, used in sensors, transducer diaphragms, electromechanical sensors, etc., can solve problems such as impairing energy transmission at low frequencies, increasing distortion, and deteriorating power control.

Inactive Publication Date: 2006-02-22
GOOGLE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, the exciter exhibits a rocking pattern that deteriorates power control, shortens life, and increases distortion
In particular, energy leakage into rocking mode impairs energy transfer at low frequencies

Method used

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  • Loudspeaker driver
  • Loudspeaker driver
  • Loudspeaker driver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] figure 1 A prior art actuator 14 is shown and has been described in detail above. Such as figure 1 As shown, the hanger 32 is spaced from the plane of the centroid 36 of the magnet assembly 16 .

[0034] figure 2 and 3 An actuator 40 according to the invention is shown. exist figure 2 Among them, the exciter 40 is installed on the acoustic radiator 42 and includes an electromagnetic motor composed of a magnet assembly 44 and a voice coil assembly 46 . Magnet assembly 44 includes magnet 48 , pole piece 50 and magnetic cup 52 such that magnet 48 is sandwiched between and attached to pole piece 50 and magnetic cup 52 . The voice coil assembly 46 includes a voice coil 54 wound on a bobbin 55 which is attached to a coupler 56 .

[0035] The voice coil assembly 46 of the exciter 40 is attached to the acoustic radiator 42 via a coupler 56 that is mounted to a mounting surface 58 of the acoustic radiator 42 . Magnet assembly 44 is mounted to voice coil assembly 46 by ...

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PUM

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Abstract

An inertial exciter (40) for an acoustic radiator (42), and a loudspeaker incorporating an acoustic radiator and such an exciter. The exciter has a massive member (44); a coupler (56) adapted for attachment to the acoustic radiator (42) and adapted for relative movement with respect to the massive member (44); a motor for effecting relative movement of the coupler with respect to the massive member; and a suspension (60) for supporting the massive member relative to the coupler. The suspension (60) acts in a plane generally passing through the center of mass of the massive member, thereby reducing any moment acting on the suspension. Also disclosed is a loudspeaker exciter assembly (70) that has a base plate (86) for attachment to an acoustic radiator in a non-repeatedly engageable manner, and an exciter (40) attached to the base plate (86) in a repeatedly engageable manner; and a loudspeaker incorporating such an exciter assembly.

Description

technical field [0001] The present invention relates to a driver or exciter for a loudspeaker, especially but not exclusively of the type of loudspeaker known as a bending wave planar loudspeaker. Background technique [0002] Such a loudspeaker is known, for example, from WO 97 / 09842 assigned to New Transducers Ltd, which comprises a resonant bending wave plate and a transducer mounted on the plate to convert an electrical signal into mechanical vibration. The transmitter produces an acoustic output by exciting a resonant bending wave mode within the plate, which then emits a sound. [0003] The properties of the acoustic radiator may be selected such that the resonant bending modes are distributed substantially evenly over frequency. In other words, the characteristics or parameters of the acoustic radiator, such as size, thickness, shape, material, etc., can be chosen to flatten the peaks in the frequency response caused by "crowding" or "clustering" of the modes. Thus,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R9/06H04R9/02H04R7/04H04R11/02
CPCH04R9/066H04R7/045
Inventor 安德烈亚斯·波斯马丁·科洛姆斯
Owner GOOGLE LLC