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US 4,790,407 AGranted
Resonance-compensated speaker system for vehicle
AssigneePioneer Electronic Corporation
InventorsHideo Yamamoto, Kazunori Takagi
Life of this patent
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Abstract
A vehicular speaker system in which a resonance of the vehicle's interior is compensated by a resonance of a chamber enclosing the rear of the speaker unit. The chamber includes rearwardly facing ports.
Claims8
A vehicular speaker system for use in
- a movable vehicle having a substantially closed interior passenger compartment comprising;
- a speaker assembly adapted to be installed in said vehicle for projecting sound into said compartment, wherein said speaker assembly comprises:
- a speaker unit;
- an axially extending chamber having a peripheral portion and an end portion respectively enclosing lateral sides and a rear side of said speaker unit;
- wherein said chamber includes ports formed between said peripheral portion and said end portion and wherein said chamber has a resonance frequency in a range of 300-600 Hz.
2 more elements
Dependencies are inferred from the claim text.