The watermark in the lower right corner of the image will not appear on the final print.
Frame
Top Mat
Bottom Mat
Dimensions
Image:
7.50" x 8.00"
Overall:
9.50" x 10.00"
Mayers Topophone 1880 Poster
Product Details
Mayers Topophone 1880 poster by Science Source. Our posters are produced on acid-free papers using archival inks to guarantee that they last a lifetime without fading or loss of color. All posters include a 1" white border around the image to allow for future framing and matting, if desired.
Design Details
Detail of a rendering of Mayer's Topophone that appeared in the July 3, 1880 issue of Scientific American. The aim of the topophone, which was... more
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3 - 4 business days
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Artist's Description
Detail of a rendering of Mayer's Topophone that appeared in the July 3, 1880 issue of Scientific American. The aim of the topophone, which was invented and patented by Professor A. M. Mayer, last winter, is to enable the user to determine quickly and surely the exact direction and position of any source of sound. The topophone consists of two resonators (or any other sound receivers) attached to a connecting bar or shoulder rest. The sound receivers are joined by flexible tubes, which unite for part of their length, and from which ear tubes proceed. One tube, it will be observed, carries a telescopic device by which its length can be varied. When the two resonators face the direction whence a sound comes, so as to receive simultaneously the same sonorous impulse, and are joined by tubes of equal length, the sound waves received from them will necessarily re-enforce each other and the sound will be augmented. If, on the contrary, the resonators being in the same position as regards the...
$53.00
