Description: electronic beeps from handheld device.

Description: electronic beep from handheld device.

Description: electronic sound from handheld device.

Description: electronic beep from handheld device.

Description: pushing quickly up and down on an flashlight button.

Description: pushing quickly up and down on an flashlight button.

Description: ultra high pitched security alarm in an airport.

Description: cd player being opened and then shut.

Description: self powered flashlight shaken for power.