div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentamerican-telephone-and-telegraph-company-and-the-western-electric-company-westernhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: American Telephone and Telegraph Company and the Western Electric Company Western Electrics Cardioid Directional Microphone is the realization of the sound transmission engineers loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader030fdocumentsnetreader030viewer20220402125e84cd9eebb75479ac5f706bhtml5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentamerican-telephone-and-telegraph-company-and-the-western-electric-company-westernhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: American Telephone and Telegraph Company and the Western Electric Company Western Electrics Cardioid Directional Microphone is the realization of the sound transmission engineers loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader030fdocumentsnetreader030viewer20220402125e84cd9eebb75479ac5f706bhtml5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentamerican-telephone-and-telegraph-company-and-the-western-electric-company-westernhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: American Telephone and Telegraph Company and the Western Electric Company Western Electrics Cardioid Directional Microphone is the realization of the sound transmission engineers loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...