LOUDSPEAKER WITH COMPLIANTLY COUPLED LOW-FREQUENCY AND HIGH-FREQUENCY SECTIONS
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United States of America Patent
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Issued Date -
Oct 15, 2015
app pub date -
Apr 15, 2014
filing date -
Apr 15, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A loudspeaker comprises a first acoustically radiating moving-coil transducer and a second acoustically radiating moving-coil transducer. Each transducer is actively driven by an electrical input signal. The first and second transducers are substantially coaxial and at least part of the second transducer is positioned within a central gap of the first transducer such that the voice-coil assemblies of the two transducers are arranged concentrically and are separated by an annular gap. The gap is substantially sealed by a compliant coupling means such that the two transducers move substantially in unison when the loudspeaker reproduces an input signal that has a frequency below a certain threshold value, but move substantially independently when the loudspeaker reproduces an input signal that has a frequency above the threshold.
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