{"id":1253,"date":"2013-11-27T22:48:01","date_gmt":"2013-11-27T22:48:01","guid":{"rendered":"http:\/\/aaron-sherwood.com\/blog\/?p=1253"},"modified":"2013-11-27T22:48:01","modified_gmt":"2013-11-27T22:48:01","slug":"super-sonic-listening","status":"publish","type":"post","link":"https:\/\/aaron-sherwood.com\/blog\/?p=1253","title":{"rendered":"Super-sonic listening"},"content":{"rendered":"<p>One of the circuits I made in my Basic Analog Circuit class was a electret microphone amp that \u00a0can have almost infinite gain. It samples itself and regulates the gain based on the input. In a quieter environment the gain can become so high that it is possible to hear things that normally the human ear cannot hear.<\/p>\n<p><a href=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/IMG_2655.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1254\" alt=\"IMG_2655\" src=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/IMG_2655.jpg\" width=\"480\" height=\"640\" srcset=\"https:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/IMG_2655.jpg 480w, https:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/IMG_2655-225x300.jpg 225w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/a><\/p>\n<p>The ITP floor is quite noisy so nothing too out of the ordinary presents itself, though some sounds are much louder than normal:\u00a0<audio class=\"wp-audio-shortcode\" id=\"audio-1253-1\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/wav\" src=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/itpSonic.wav?_=1\" \/><a href=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/itpSonic.wav\">http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/itpSonic.wav<\/a><\/audio><\/p>\n<p>The wooden mirror sound really interesting, though the general noise from the busy floor interferes:\u00a0<audio class=\"wp-audio-shortcode\" id=\"audio-1253-2\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/wav\" src=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/woodenmirrorSonic.wav?_=2\" \/><a href=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/woodenmirrorSonic.wav\">http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/woodenmirrorSonic.wav<\/a><\/audio><\/p>\n<p>I then went into the stairwell to try to find a quieter place. I had just eaten some almonds and was moving my tongue around in my mouth, and I could hear all the sounds in my mouth! Here is a recording, the mic was no where near my mouth, it sounds sort of crazy:\u00a0<audio class=\"wp-audio-shortcode\" id=\"audio-1253-3\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/wav\" src=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/toungeinmouthSonic.wav?_=3\" \/><a href=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/toungeinmouthSonic.wav\">http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/toungeinmouthSonic.wav<\/a><\/audio><\/p>\n<p>I then went into the back stairwell, where there are some interesting oscillations going on:\u00a0<audio class=\"wp-audio-shortcode\" id=\"audio-1253-4\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/wav\" src=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/stairwellSonic.wav?_=4\" \/><a href=\"http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/stairwellSonic.wav\">http:\/\/aaron-sherwood.com\/blog\/wp-content\/uploads\/2013\/11\/stairwellSonic.wav<\/a><\/audio><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the circuits I made in my Basic Analog Circuit class was a electret microphone amp that \u00a0can have almost infinite gain. It samples itself and regulates the gain based on the input. In a quieter environment the gain &hellip; <a href=\"https:\/\/aaron-sherwood.com\/blog\/?p=1253\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,76],"tags":[],"class_list":["post-1253","post","type-post","status-publish","format-standard","hentry","category-itp","category-temporaryexpert"],"_links":{"self":[{"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1253"}],"version-history":[{"count":6,"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1253\/revisions"}],"predecessor-version":[{"id":1264,"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1253\/revisions\/1264"}],"wp:attachment":[{"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aaron-sherwood.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}