Monopole low frequency test woofer
AssigneeVisteon Global Technologies, Inc.
InventorDavid Alan Dage
Life of this patent
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Abstract
A monopole low frequency test woofer (10) has a rigid mounting plate (!2) with an acoustical opening (14), a monopole driver (16) with a high mass cone and low resonance mounted on the mounting plate with the basket (13) of the driver fitting about the opening, and a rear tub (20) attached to the mounting plate forming a sealed enclosure about the driver. An inductor (18) is also in connected in series with the monopole driver inside the enclosure. The sealed enclosure has an electrical connector (26) for making connection to an external circuit. The difference in outputs between the test woofer and standard optimized speaker represents the loss in baffling due to the vehicle environment being less than ideal.
Claims20
A monopole low frequency test woofer, comprising:
- a rigid mounting plate having an acoustical opening;
- a monopole driver having a high mass cone and low resonance in free air, said driver being mounted on said mounting plate with a basket of said driver fitting about said acoustical opening;
- an inductor connected in series with said monopole driver;
- a rear tub attached to said mounting plate forming an enclosure housing said monopole driver and inductor;
- and
- an electrical connector on said rear tub for connecting said monopole driver and inductor to an external circuit.
A band limited radiating source, comprising:
- a rigid mounting plate having an acoustical opening;
- a monopole low frequency driver mounted on said mounting plate with a basket of said driver fitting about said acoustical opening;
- a tub sealed to said mounting plate forming an enclosure housing said monopole driver;
- and
- an electrical connector on said tub for connecting said monopole driver to an external circuit.
A method for determining loss in baffling due to speaker environment in a vehicle being non-ideal, comprising the steps of:
- producing a monopole low frequency test woofer having a frequency response and resonance output matching an optimized vehicle dipole speaker;
- determining output of the vehicle dipole speaker;
- measuring output of said test woofer in said vehicle;
- and
- comparing said outputs with appropriate level correction and determining frequency response difference which is the loss in baffling due to speaker environment in the vehicle.
Dependencies are inferred from the claim text.