Photos displaying on either side of this one in the Prints & Photographs Online Catalog may yield clues—view the neighboring photos: www.loc.gov/pictures/related/?&pk=hec2013003254&s...
Harris & Ewing,, photographer.
[Vivian Leroy Crisler (1885-1953), an acoustics researcher at the National Bureau of Standards, Washington, D.C., looking over a loud speaker horn used in sound penetration tests]
[between 1923 and 1929]
1 negative : glass ; 5 x 7 in. or smaller
Title information from press notes/caption for a similar photograph and Flickr Commons Project, 2015.
Date based on date of negatives in same range.
Gift; Harris & Ewing, Inc. 1955.
No known restrictions on publication.
Library of Congress, Prints and Photographs Division, Washington, D.C. 20540 USA, hdl.loc.gov/loc.pnp/pp.print
Harris & Ewing Collection (Library of Congress)
General information about the Harris & Ewing Collection is available at hdl.loc.gov/loc.pnp/pp.hec
Higher resolution image is available (Persistent URL): hdl.loc.gov/loc.pnp/hec.32696
Owner: The Library of Congress
Source: Flickr Commons