A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Illustrated description of speaker with 6-cell, high frequency horn, mounted on end of low frequency unit pole piece. (see also Soc Motion Picture Engrs -- J v 43 n 3 Sept 1944 p 168-73)
Illustrated description of speaker with 6-cell, high frequency horn, mounted on end of low frequency unit pole piece. (see also Soc Motion Picture Engrs -- J v 43 n 3 Sept 1944 p 168-73)
Duplex loud speaker
Communications
Lansing, J.B. (author)
Communications ; 23
1943
Article (Journal)
English
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