| 摘要 |
A combined aerial and siren alert system for a vehicle comprising an aerial 2 mounted on the exterior of a vehicle and a microphone 8 mounted near the aerials free end, the aerial being typically a whip-type aerial. The aerial has an electrical feed 18 to an in-car entertainment system 16 and a separate electrical feed 14 to a siren alert system 12 mounted inside the vehicle. The siren alert system stores audio signatures corresponding to a plurality of emergency vehicle sirens and outputs a visual alert when an audio signal associated with an emergency vehicle siren is detected. The microphone 8 may be an array of multiple transducers so that an approximate direction of the emergency vehicle may be determined and displayed in the form of a pointer on the visual display.
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