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US 11,641,553 B1Granted
Magnetic field canceling 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.
Claims17
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, wherein the audio output signal is associated with information about the hidden or buried utility;
- 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;
- 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 over a predefined frequency or range of frequencies in which the locator senses magnetic field signals from the hidden or buried utility.
6 more elements
A shielded audio system for use with a buried utility locator, comprising:
- an enclosure;
- input wiring including terminals or connection points for connection to an audio output signal provided from the buried utility locator, wherein the audio output signal is associated with a hidden or buried utility detected by the buried utility locator;
- a first electromagnetic audio driver having terminals operatively coupled to the input wiring to receive the audio output signal and provide a first audio output signal associated with the hidden or buried utility detected by the buried utility locator;
- and
- a second electromagnetic audio driver having terminals operatively coupled to the input wiring to receive the audio output signal and provide a second audio output signal associated with the hidden or buried utility detected by the buried utility locator;
- 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 over a range of frequencies overlapping a predetermined frequency or frequency range in which the locator senses magnetic field signals from the hidden or buried utility.
3 more elements
Dependencies are inferred from the claim text.