1Dr. TrevorJ. Cox, Dr. Peter D'Antonio . Acoustic Absorbers and l)iflilsers: Theory, Design and Application [M]. Taylor & Francis 2009 2nd Edition.
2AES-4id-2111)1 (r2007): AES information document for room acoustics and sound reinforcement systems - Characterization and measurement of surface scattering uniformity, http://www. aes.org/publications/standards/search.cfm?doclD=4.