San Francisco : Architect and Engineer, Inc · leaf 84
ine the intensity and frequency ofsound waves produced. This ingeniousequipment shows both the volume andpitch of sound at varying speeds... so thatair coolers, forced air furnaces and fans canbe operated with minimum noise. Fromthese tests, UTILITY engineers have anaccurate picture of the sound of… … FEBRUARY, 1 946 31 WITH THE ENGINEERS Structural Engineers Association of Northern California W. Adrian, President; William W. Moore, Vice-President; Franklin P. Ulrich, Sec-Treas.; John A.Blume, Asst. Sec-Treas.; Offices 214 Old MintBuilding, San Francisco, Phone GArfield 3890. DI-RECTORS, H. M.…
Architecture · Building
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