Patent ID: 8749394

Claim:
A alarm device, comprising: a detection device configured to detect an alarm condition; a voltage boost regulator, said voltage boost regulator configured to generate a boosted DC power signal by boosting a DC input voltage from a battery source, said boosted DC power signal having at least a threshold DC voltage associated with a threshold sound intensity; a non-linear amplifier configured to amplify a signal, said non-liner amplifier powered by the boosted DC power signal generated by the voltage boost regulator; signal processing circuitry that is configured to receive an alarm condition detection signal from the detection device and in response to the signal, generate an output signal to the non-linear amplifier such that the non-liner amplifier generates an amplified output signal; and a speaker that is configured to receive the amplified output signal from the non-linear amplifier and output an audible alert signal, said speaker comprising a diaphragm driven by a coil.