HEAD-UP DISPLAY DEVICE

A head-up display device (HUD) includes a sound analysis portion that determines whether a specific alarm is involved in sound signals from microphones to to collect ambient sound around a vehicle When a specific alarm has been detected as determined by the sound analysis portion an image display unit displays icons representing the specific alarm. The specific alarm includes a siren sound given from an emergency vehicle and a horn sound given from a general vehicle and the sound analysis portion analyzes frequency of input sound signals and thereby determines whether the sound is the specific alarm.