Bushfire Alarm Design

I'm seeking an experienced designer to create a battery-powered, outdoor audible alarm system (sirens) for bushfire early warning. Key requirements: - Design an effective audible alarm (sirens) - Suitable for outdoor installation - Battery-powered and durable against harsh weather conditions Ideal skills and experience: - Experience in alarm system design - Knowledge of outdoor, battery-powered systems - Ability to create weather-resistant designs - Background in safety systems or emergency response is a plus