Fuzzy logic device for automatic sound control
AssigneeU.S. Philips Corporation
InventorJean-Philippe Boyer
Life of this patent
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Abstract
A device for automatic sound control includes a detection circuit for supplying objective sound and/or noise measurements relating to an ambient sound volume, and a fuzzy logic control circuit for adjusting, in response to the ambient noise measurements sound transmission characteristics supplied by an acoustic device. The device includes a fuzzy logic conversion circuit which is arranged between the detection circuit and the control circuit and transforms the objective ambient noise measurements into subjective ambient noise measurements for performing said settings. The device can learn the personal settings defined by a listener. The device can also detect speech and perform specific settings.
Claims6
An automatic sound control device comprising:
- an acoustic device including a sound transmission device,
- detection means including sensor means responsive to ambient sound for producing a first objective signal comprising objective sound signals and objective ambient noise signals, frequency selective means responsive to said first objective signal and to a second objective signal derived from an electric audio output signal of the acoustic device so as to provide a first and second plurality of selective objective signals, and means for combining said first and second plurality of selective objective signals so as to derive a plurality of selective objective ambient noise signals,
- fuzzy logic conversion means coupled to the detection means and responsive to said plurality of selective objective ambient noise signals to transform said selective objective ambient noise signals into at least one subjective ambient noise signal, and
- fuzzy logic control means coupled to the fuzzy logic conversion means and responsive to said at least one subjective ambient noise signal to derive at its output a control signal for control of the gain of the acoustic device.
Dependencies are inferred from the claim text.