We present the design and experimental verification of a membrane-type resonator-based Schroeder diffuser (MRSD). The membrane-type resonator consists of a decorated membrane and a rigid back cavity. By combining multiple resonators with the phase shift profile based on the quadratic residue sequence, the MRSD can produce a high efficiency diffuse sound field. Furthermore, the designed MRSD has a thickness with deep-subwavelength scale, which is 1 order of magnitude thinner than the conventional diffuser constructed with periodical wells. The proposed MRSD has advantages in low frequency applications and offers versatility for novel manipulations of sound.

中文翻译：

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基于膜式谐振器的超薄施罗德扩散器的设计与验证

我们介绍了基于膜式谐振器的施罗德扩散器 (MRSD) 的设计和实验验证。膜式谐振器由装饰膜和刚性后腔组成。通过将多个谐振器与基于二次残差序列的相移分布相结合，MRSD 可以产生高效的扩散声场。此外，设计的MRSD具有深亚波长尺度的厚度，比用周期性井构造的常规扩散器薄1个数量级。所提出的 MRSD 在低频应用中具有优势，并为新的声音处理提供了多功能性。