A security device comprising: a housing; an electronic article surveillance tag disposed in the housing, the electronic article surveillance tag being configured to: resonate to provide a wireless response signal in response to an output field of a deactivator to cause the generation of a deactivation field by the deactivator by increasing a power of the output field at a same frequency; resonate to provide the wireless response signal to a gate to trigger a gate alarm in response to a gate field; and tamper detection circuitry disposed within the housing, the tamper detection circuitry comprising: a tamper sensor configured to generate a tamper signal in response to detecting a tamper event; a deactivation sensor tuned to the same frequency and configured to: detect the deactivation field having at least a threshold power; and generate a deactivation signal in response to detecting the deactivation field; and a sounder; wherein the tamper detection circuitry is configured to: trigger the sounder to emit an alarm sound in response to receiving the tamper signal from the tamper sensor when the tamper detection circuitry is in an active state; and deactivate the triggering of the sounder by transitioning the tamper detection circuitry from the active state to a deactivated state, in response to receiving the deactivation signal from the deactivation sensor such that receipt of the tamper signal while the tamper detection circuitry is in the deactivated state does not trigger the sounder to emit the alarm. a housing; an electronic article surveillance tag disposed in the housing, the electronic article surveillance tag being configured to: resonate to provide a wireless response signal in response to an output field of a deactivator to cause the generation of a deactivation field by the deactivator by increasing a power of the output field at a same frequency; resonate to provide the wireless response signal to a gate to trigger a gate alarm in response to a gate field; and resonate to provide a wireless response signal in response to an output field of a deactivator to cause the generation of a deactivation field by the deactivator by increasing a power of the output field at a same frequency; resonate to provide the wireless response signal to a gate to trigger a gate alarm in response to a gate field; and tamper detection circuitry disposed within the housing, the tamper detection circuitry comprising: a tamper sensor configured to generate a tamper signal in response to detecting a tamper event; a deactivation sensor tuned to the same frequency and configured to: detect the deactivation field having at least a threshold power; and generate a deactivation signal in response to detecting the deactivation field; and a sounder; a tamper sensor configured to generate a tamper signal in response to detecting a tamper event; a deactivation sensor tuned to the same frequency and configured to: detect the deactivation field having at least a threshold power; and generate a deactivation signal in response to detecting the deactivation field; and detect the deactivation field having at least a threshold power; and generate a deactivation signal in response to detecting the deactivation field; and a sounder; wherein the tamper detection circuitry is configured to: trigger the sounder to emit an alarm sound in response to receiving the tamper signal from the tamper sensor when the tamper detection circuitry is in an active state; and deactivate the triggering of the sounder by transitioning the tamper detection circuitry from the active state to a deactivated state, in response to receiving the deactivation signal from the deactivation sensor such that receipt of the tamper signal while the tamper detection circuitry is in the deactivated state does not trigger the sounder to emit the alarm. trigger the sounder to emit an alarm sound in response to receiving the tamper signal from the tamper sensor when the tamper detection circuitry is in an active state; and deactivate the triggering of the sounder by transitioning the tamper detection circuitry from the active state to a deactivated state, in response to receiving the deactivation signal from the deactivation sensor such that receipt of the tamper signal while the tamper detection circuitry is in the deactivated state does not trigger the sounder to emit the alarm.