@book{bhlitem55301, title = {Elements of acoustical engineering }, copyright = {Public domain. The BHL considers that this work is no longer under copyright protection.}, url = {https://www.biodiversitylibrary.org/item/55301}, note = {https://www.biodiversitylibrary.org/bibliography/16365}, publisher = {New York, D. Van Nostrand company, inc, 1940}, author = {Olson, Harry Ferdinand,}, year = {}, pages = {368}, keywords = {Electro-acoustics|Recording and reproducing|Sound|}, }