Abstract: A sound generator apparatus configured to improve sound quality for a sound generator that includes a processing device and a memory coupled to the processing device. The sound generator apparatus also includes a sound generator coupled to the processing device. Further, the sound generator apparatus includes a program residing in memory and configured to be run on the processing device that is configured to vary the output amplitude of the sound generator depending on the sound generator frequency. A method of improving sound quality for a sound generator that includes providing a signal indicative of a sound frequency to be generated. The method includes calculating volume adjustment information according to the sound frequency to be generated. Further, the method includes providing the current volume setting and adjusting the volume based on the volume adjustment information.

Abstract: A sound generator circuit configured for a handheld computer is disclosed. A method of producing a tone with a sound generator and handheld computer is also disclosed. The sound generator circuit includes a low pass filter having an input and an output. The input is coupled to a pulse width modulated (PWM) signal line. The sound generator circuit also includes a switching circuit coupled to the output of the low pass filter and being controlled by the output of the low pass filter. Further, the sound generator circuit includes a sound generator having a first and a second terminal. Further still, the sound generator circuit can include a high-pass filter coupled across the first and second terminals.

Abstract: A sound generator apparatus that is configured to improve sound quality for a sound generator is disclosed. The sound generator apparatus includes a processing device and a memory coupled to the processing device. The a sound generator apparatus also includes a sound generator coupled to the processing device. Further, the sound generator apparatus includes a program residing in memory and configured to be run on the processing device. The program configured to vary the output amplitude of the sound generator depending on the sound generator frequency.

Abstract: A method and system for disabling at least a portion of at least one personal electronic device on board a vehicle is disclosed. The method and system includes sending a radio frequency signal from a transmitter on the vehicle. The method and system also includes receiving the RF signal by a receiver of the at least one personal electronic device. Further, the method and system includes interpreting the RF signal in a manner causing at least a portion of the at least one personal electronic device to be disabled.

Abstract: A sound generator circuit configured for a handheld computer is disclosed. A method of producing a tone with a sound generator and handheld computer is also disclosed. The sound generator circuit includes a low pass filter having an input and an output. The input is coupled to a pulse width modulated (PWM) signal line. The sound generator circuit also includes a switching circuit coupled to the output of the low pass filter and being controlled by the output of the low pass filter. Further, the sound generator circuit includes a sound generator having a first and a second terminal. Further still, the sound generator circuit can include a high-pass filter coupled across the first and second terminals.