1. 1. (8 marks) When recording live performances, sound engineers often use a mi
ID: 3343071 • Letter: 1
Question
1. 1. (8 marks) When recording live performances, sound engineers often use a microphone with a cardioid pickup pattern because it suppresses noise from the audience. Suppose the microphone is placed 3 m from the front of the stage and the boundary of the optimal pickup region is given by the cardioid , where r is measured in meters and the microphone is at the pole. The musicians want to know the area they will have on stage within the optimal pickup range of the microphone. Answer their question.
Explanation / Answer
radius of the optimal pick up region is 3m
therefore the area of the trgion is pi*r^2
A=28.26 m^2
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