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US 6,324,294 B1Granted
Passenger vehicles incorporating loudspeakers comprising panel-form acoustic radiating elements
AssigneeNew Transducers Limited
InventorsHenry Azima, Martin Colloms, Christien Ellis
Life of this patent
Estimating the term…
Abstract
A vehicle having a passenger compartment with a moulded headlining to which an exciter is coupled and together forming a distributed mode acoustic radiator, the headliner providing a bass acoustic response when resonating. A mid/high frequency acoustic radiator also may be carried by the headlining. Other interior components of the vehicle (seats, door panels, visors, etc.) also may comprise acoustic radiators.
Claims11
A vehicle having a passenger compartment comprising:
- a vehicle headlining having selected values of certain physical parameters which enable the vehicle headlining to sustain and propagate input vibrational energy in a predetermined frequency range including at least low frequencies by the vehicle headlining when resonating having at least one site at which the number of vibrationally active resonance anti-nodes is relatively high;
- and
- at least one vibration exciter attached directly to the vehicle headlining at at least one of said sites, the exciter being capable of vibrating the vehicle headlining in the predetermined frequency range to couple to and excite at least the low-frequency resonant bending wave modes in the vehicle headlining and cause the vehicle headlining to resonate at low frequencies forming an acoustic radiator providing a bass acoustic output when resonating.
A vehicle component for a passenger compartment, comprising:
- a lining member having selected values of certain physical parameters which enable the lining member to sustain and propagate input vibrational energy in a predetermined frequency range including at least low frequencies by the lining member when resonating having at least one site at which the number of vibrationally active resonance anti-nodes is relatively high;
- and
- at least one vibration exciter attached directly to the lining member at at least one of said sites, the exciter being capable of vibrating the lining member in the predetermined frequency range to couple to and excite at least the low-frequency resonant bending wave modes in the lining member and cause the lining member to resonate at low frequencies forming an acoustic radiator providing a bass acoustic output when resonating.
Dependencies are inferred from the claim text.