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A Note on the Silencing of Air-stirring Motors

Eberhardt, W. H. (1946) A Note on the Silencing of Air-stirring Motors. Science, 103 (2675). pp. 429-430. ISSN 0036-8075. doi:10.1126/science.103.2675.429-a.

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Air-stirring motors are often viewed with disparagement in the laboratory because of the rather large amount of noise which attends their use. This noise may be traced to four sources: (1) that arising from the turbulent discharge of air from· the compressed air lines into tubing connecting with the motor; (2) that due to air rushing through the pipes and the connecting tubing; (3) that inherent in the use of an air motor, i.e. bearing noise and the clear tone of audio-frequency which is associated with all turbines; and (4) that resulting from the air rushing out of the small escape ports generally provided in the flat surface on top of the motor. Of these sources, the first and fourth are by far the most important because of both the intensity and the raucous character of the noise arising from them. The devices suggested here have been found very useful in reducing to a very large extent the noise from these two sources. The second and third sources enumerated are of smaller importance, but their contribution to the total noise may be minimized by suitable choice of connective tubing and by judicious oiling.

Item Type:Article
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Additional Information:© 1946 American Association for the Advancement of Science.
Issue or Number:2675
Record Number:CaltechAUTHORS:20150810-120351971
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Official Citation:A Note on the Silencing of Air-Stirring Motors Author(s): W. H. Eberhardt Source: Science, New Series, Vol. 103, No. 2675 (Apr. 5, 1946), pp. 429-430 Published by: American Association for the Advancement of Science DOI: 10.1126/science.103.2675.429-a Stable URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59353
Deposited By: George Porter
Deposited On:11 Aug 2015 14:59
Last Modified:10 Nov 2021 22:19

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