P4_8 Doppler Ambulance

Owen William Morris, Lewis Jefferey Banks, Aaron James Laird, Liam Stuart Morris


In this paper, we investigate the scenario of an ambulance moving towards and away from an observer at rest. We calculated the maximum velocity, of both the ambulance travelling towards and away, required for the siren to be inaudible to humans. It was found that an ambulance travelling towards and away from an observer, velocities of 331 ms−1 and 16.0 kms−1 respectively would be required.

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