試題詳解

【已刪除】37.
(A) When you arc closc to where the pebble fell, the waves ans clcarly in a circle, centered on where the pebble fell.
(B) These are measured to ensure compliance with laws that govern acceptable sound emitted from a vehicle.
(C) Engineers can use scveral analysis tochniques to identify noise sources including near-field acoustic holography (NAH) and beamforming.
(D) Beamforming presents several challenges including simultaneously measuring a large number of microphone sensors: transmitting and saving this large amount of acquired waveform data, and being able to quickly process large data sets.