document: Theoretical and experimental investigations on coherence of traffic noise transmission through an open window into a rectangular room in high-rise buildings A method for theoretically calculating the coherence between sound pressure inside a rectangular room in a high-rise building and that outside the open window of the room is proposed . The traffic noise transmitted into a room is generally dominated by low-frequency components , to which active noise control -LRB- ANC -RRB- technology may find an application . However , good coherence between reference and error signals is essential for an effective noise reduction and should be checked first . Based on traffic noise prediction methods , wave theory , and mode coupling theory , the results of this paper enabled one to determine the potentials and limitations of ANC used to reduce such a transmission . Experimental coherence results are shown for two similar , empty rectangular rooms located on the 17th and 30th floors of a 34 floor high-rise building . The calculated results with the proposed method are generally in good agreement with the experimental results and demonstrate the usefulness of the method for predicting the coherence
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