試題詳解

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(A) When you are close to where the pebble fell, the waves are clearly in a circle, centered on where the pebble fell.
(B) These arc measured to ensure compliance with laws that govemn acceprable sound emitted from a vehicle.
(C) Engineers can use several analysis techniques to identify aoise sources including near-field acoustic holography (NAH) and beamforming.
(D) Beanforming presents several challenges including simultaneously measuring a large number of microphone sensors, transmitling and saving this large amount of acquired wavcform data, and being able to quickly process large data sets.