Loudspeaker
AssigneeQinetiq Limited
InventorsKenneth H Heron, Malcolm Nash, Andrew P Payne
Life of this patent
Estimating the term…
Abstract
Conventional analog loudspeakers have a limited dynamic range as compared to the available dynamic range of digital recordings. Digital recordings use up to 24 bits and this implies a dynamic range of 141 dB. Digital loudspeakers, involving 2N single bit devices (with N=24, this number is 1.7×107) have been proposed. The present improvement is the provision of at least one loudspeaker, a plurality of analog drivers and the audio input supplied to a control processor which in turn drives one or more of the plurality of independent analog drivers. The number of drivers in operation at any one time is determined by the amplitude of the input audio signal to the control processor.
Claims22
A multiple input loudspeaker system comprising:
- at least one loudspeaker;
- a plurality of analog drivers for driving the at least one loudspeaker;
- and
- a control processor, responsive to an input signal, for providing the plurality of analog drivers with a drive signal, said drive signal having a time varying signal level and wherein the operation of each of said drivers is independently controlled in response to the amplitude of said input signal level in a given frequency range.
A loudspeaker system for translating a master electrical signal into acoustic energy, said system comprising:
- at least one loudspeaker,
- a plurality of loudspeaker driven for translating respective electrical signals into acoustical movement of said at least one loudspeaker;
- and
- a controller, responsive to said master electrical signal, for providing an electrical output to each of said drivers, wherein the amplitude of the master signal determines the signal supplied to each of said drivers.
Dependencies are inferred from the claim text.