An anti-resonance pulse was an energy discharge which had the capability of neutralizing proximity resonance circuitry. Lieutenant Commander Tuvok attempted to use an anti-resonance pulse to disarm a subspace warhead armed with proximity resonance circuitry in 2378, after the warhead locked on to the USS Voyager's warp signature. The warhead subsequently began rotating its activation frequency, however, neutralizing the pulse. (VOY: "Human Error")