Acoustic holography is an effective method to analysis noise fields.
声全息方法是分析噪声场的一种有效手段。
The acoustic material is an effective measure which could reduce noise and improve acoustic environment.
声学材料是降低噪声，改善声环境的有效措施。
The acoustic material is an effective measure which could reduce noise and improve acoustic environment.
声学材料是降低噪声，改善声环境的有效措施。
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