Ebook Collected Papers on Acoustics (Classic Reprint)

[Ebook.cgE0] Collected Papers on Acoustics (Classic Reprint)

[Ebook.cgE0] Collected Papers on Acoustics (Classic Reprint)

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Excerpt from Collected Papers on AcousticsOn the one hand we have the problem (reverberation) which we have been discussing up to the present moment, and on the other the whole Question of the transmission of sound from one room to another, through the walls, the doors, the ceiling and the oors; and the telephonic transmission, if I may so call it, through the length of the structure. It is five years ago since this second problem was first attacked and though the research is certainly not complete, some ground has been covered. A quantitatively exact method has been established and the transmission of sound through about twenty different kinds of partitions has been determined.For example: Transmission of sound through four kinds of doors has been studied; two of oak, two of pine, one of each kind was paneled and was relatively thin and light; one of each kind was very heavy, nearly four centimetres thick; through four kinds of windows, one of plate glass one with common panes, one double with an air space of two centimetres between, one with small panes set in lead such as one sees in churches; through brick walls with plaster on both sides; through walls of tile similarly plastered; through walls of a character not common in France and which we call gypsum block; through plaster on lath; through about ten different kinds of sound insulators, patented, and sold in quantities representing hundreds of thousands of dollars each year, yet practically without value, since one can easily converse through six thicknesses of these substances and talk in a low tone through three, while a single thickness is that ordinarily employed. The behavior of an air space has been studied, the effect of the thickness of this air space, and the result of filling the space with sand, saw-dust and asbestos. In spite of all this, the research is far from complete and many other forms of construction must be investigated before it will be possible to publish the results; these determinations must be made with the greatest exactness as very important interests are involved.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. Archives - Phillycom Archives and past articles from the Philadelphia Inquirer Philadelphia Daily News and Phillycom International Journal of Engineering Research and International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research RECENT BOOKS - Index Paul ten Have Maurice Nevile Pentti Haddington Trine Heinemann Mirka Rauniomaa eds (2014) Interacting with Objects: Language Materiality and Social Activity worldcatorg/search We would like to show you a description here but the site wont allow us Essay Writing Service - EssayEruditecom We provide excellent essay writing service 24/7 Enjoy proficient essay writing and custom writing services provided by professional academic writers Fountains Residents Network - A blog for concerned residents A blog for concerned residents From CAMM: On March 15 2017 the following letter was received by all the residents who had written to the Ms Burdick Mayor of Entertainment News - Los Angeles Times LA Times entertainment news from Hollywood including event coverage celebrity gossip and deals View photo galleries read TV and movie reviews and more Lootcoza: Sitemap 3426300040251 La Cathedrale Du Temps Versailles 9780194234474 0194234479 Oxford Bookworms Library: Starter Level: ORCA - 250 Headwords Phillip Burrows Mark Foster Noise music - Wikipedia Noise music is a category of music that is characterised by the expressive use of noise within a musical context This type of music tends to challenge the Lootcoza: Sitemap 9781600448812 160044881X A Comer (Getting Dinner) Jennifer Gillis 9780757925733 0757925731 Pop Celebration - B-Flat Tenor Saxophone Frank Erickson John Edmondson
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