Loudspeaker system installed on an automobile door and including a woofer and a tweeter
AssigneePioneer Electronic Corporation
InventorsFumio Murayama, Takashi Suzuki
Life of this patent
Estimating the term…
Abstract
In a mobile loudspeaker system comprising a woofer and a tweeter. A resonance circuit is inserted in the network of the woofer so that the frequency characteristic of sound pressure inside the vehicle at a middle-frequency range is substantially flat.
Claims4
A mobile compound loudspeaker system mounted in the passenger compartment of a vehicle, said system comprising at least a first middle/low frequency loudspeaker for reproducing middle/low frequency sound, and a second loudspeaker for reproducing high frequency sound, said speakers being mounted on a vehicle door of said vehicle, and a first circuit comprising parallel conductors for connecting said middle/low frequency speaker to a signal source, said second loudspeaker being connected by a second circuit across said parallel conductors of said first middle/low frequency loudspeaker, said first circuit including a filter comprised by a first inductance element and a first capacitor, wherein said first capacitor is connected to said conductors in parallel with said first middle/low frequency speaker, said system further comprising:
- a resonance circuit connected in said first circuit in series between said first inductance element and said first capacitor of said filter for said middle/low frequency speaker to suppress enhancement in a middle-frequency range in a frequency characteristic of sound pressure.
A mobile compound loudspeaker system mounted in the passenger compartment of a vehicle, said system comprising:
- a first middle/low frequency loudspeaker for reproducing middle/low frequency sound and a first high frequency loudspeaker for reproducing high frequency sound, said first middle/low frequency loudspeaker and said first high frequency loudspeaker being mounted in one of the right and left vehicle doors of said vehicle;
- a second middle/low frequency loudspeaker for reproducing middle/low sound and a second high frequency loudspeaker for reproducing high frequency sound, said second middle/low frequency loudspeaker and said second high frequency loudspeaker being mounted in the other of the right and left vehicle doors of said vehicle;
- a first circuit comprising a first set of parallel conductors for connecting said first middle/low frequency speaker to a signal source, said first high frequency speaker being connected by a second circuit across said first set of parallel conductors of said first middle/low frequency loudspeaker, said first circuit including a first filter comprised by a first inductance element and a first capacitor, wherein said first capacitor is connected to said first set of conductors in parallel with said first middle/low frequency speaker;
- a first resonance circuit connected in said first circuit in series between said first inductance element and said first capacitor of said first filter for said first middle/low frequency speaker to suppress enhancement in a middle-frequency range in a frequency characteristic of sound pressure;
- a third circuit comprising a further set of parallel conductors for connecting said second middle/low frequency speaker to the signal source, said second high frequency speaker being connected by a fourth circuit across said further set of parallel conductors of said second middle/low frequency loudspeaker, said third circuit including a second filter comprised by a second inductance element and a second capacitor, wherein said second capacitor is connected to said further set of conductors in parallel with said second middle/low frequency speaker;
- and
- a second resonance circuit connected in said third circuit in series between said second inductance element and said second capacitor of said second filter for said second middle/low frequency speaker to suppress enhancement in a middle-frequency range in a frequency characteristic of sound pressure.
Dependencies are inferred from the claim text.