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US 12,464,292 B1Granted
Magnetic field cancelling audio devices
AssigneeSeescan, Inc.
InventorsRay Merewether, Mark S. Olsson
Life of this patent
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Abstract
Magnetic field cancelling audio systems and associated devices are disclosed. In one embodiment, an audio system with two electromagnetic audio drivers positioned and electrically connected to reduce emitted magnetic fields over a range of predefined frequencies.
Claims20
A shielded audio locator system, comprising:
- a buried utility locator for sensing magnetic field signals emitted from a hidden or buried utility as a result of current flowing therein and determining information about the hidden or buried utility from the sensed magnetic field signals;
- and
- a shielded audio module, comprising:
- an enclosure;
- input wiring including terminals or connection points for connection to an audio output signal from the buried utility locator;
- a first electromagnetic audio driver having terminals operatively coupled to the input wiring to receive the audio output signal;
- and
- a second electromagnetic audio driver having terminals operatively coupled to the input wiring to receive the audio output signal.
5 more elements
A shielded audio system, comprising:
- an enclosure including one or more holes to allow sound generated within the enclosure to propagate to the exterior;
- input wiring including terminals or connection points for connection to an audio output signal;
- a first electromagnetic audio driver having terminals operatively coupled to the input wiring to receive the audio output signal with a first polarity;
- and
- a second electromagnetic audio driver, of the same type as the first electromagnetic audio driver, having terminals operatively coupled to the input wiring to receive the audio output signal with a second polarity;
- wherein the first electromagnetic audio driver and the second electromagnetic audio driver are positioned within the enclosure so as to at least partially cancel alternating current (AC) magnetic field signals emitted therefrom over a predefined frequency or range of frequencies overlapping a predetermined frequency or frequency range.
3 more elements
Dependencies are inferred from the claim text.