References
- Journal of Sound and Vibration v.68 no.3 The Acoustic Characteristics of Duct Bend A. Cabelli
- Journal of Sound and Vibration v.56 no.1 A Reactive Acoustic Attenuator C.R. Fuller;D.A. Bies
- MSc Dissertation, KAIST A Study on Narrowband Noise Reduction Characteristics of Acoustic Screens in a Rectangular Duct Minhong Rim
- Acoustics: An Introduction to Its Physical Principles and Applications Allan D. Pierce