The Sound Monitor may be placed in a room to alert the user to sounds such as a baby's cry, an apartment door buzzer, alarm clock, oven timer, etc. The new improved Sound Monitor adds a delay circuit so that loud sounds that are very brief (such as a door slamming) will not activate it even if those sounds are in fact above the detection threshold. When the sound monitor detects a sound that is above its adjustable detection threshold, it sends a signal to any Silent Call® receiver (except the Shakeup), activating the vibrator and/or visual alert. The Sound Monitor operates from two AAA alkaline batteries, which will last 1-2 months in continuous use and longer if the monitor is not always turned on. Range is approximately 100 feet.