{"id":275,"date":"2013-12-29T18:26:56","date_gmt":"2013-12-29T18:26:56","guid":{"rendered":"http:\/\/blog.soton.ac.uk\/soundwaves\/?page_id=275"},"modified":"2014-01-24T12:35:40","modified_gmt":"2014-01-24T12:35:40","slug":"6-summary","status":"publish","type":"page","link":"https:\/\/blog.soton.ac.uk\/soundwaves\/hearing-sounds\/6-summary\/","title":{"rendered":"Summary"},"content":{"rendered":"<h4>Harmonics<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-276\" alt=\"Web-he7\" src=\"http:\/\/blog.soton.ac.uk\/soundwaves\/files\/2013\/12\/Web-he7.gif\" width=\"149\" height=\"113\" \/><br \/>\nMusical notes are complex tones consisting of a fundamental frequency, <em>f<\/em>, and higher harmonics (or partials) that are integer multiples of the fundamental frequency (2<em>f<\/em>, 3<em>f<\/em>, 4<em>f<\/em>,&#8230;). The pitch of a note remains unchanged even if its fundamental frequency as well as its first partials are removed.<\/p>\n<h4><\/h4>\n<h4>Shepard\/Risset tones<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-277\" alt=\"Web-he1\" src=\"http:\/\/blog.soton.ac.uk\/soundwaves\/files\/2013\/12\/Web-he1.gif\" width=\"125\" height=\"94\" \/><br \/>\nThese paradoxical notes seem to keep rising for ever.<\/p>\n<h4><\/h4>\n<h4><\/h4>\n<h4>Beats<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-278\" alt=\"Web-he8\" src=\"http:\/\/blog.soton.ac.uk\/soundwaves\/files\/2013\/12\/Web-he8.gif\" width=\"149\" height=\"113\" \/><br \/>\nWhen two pure tones of very similar frequency are played together they produce beats at a frequency equal to the difference between the original two frequencies.<\/p>\n<h4><\/h4>\n<h4>The sound of filtering<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-thumbnail wp-image-262\" alt=\"normalmushrooms1\" src=\"http:\/\/blog.soton.ac.uk\/soundwaves\/files\/2013\/12\/normalmushrooms1-150x150.png\" width=\"150\" height=\"150\" \/><br \/>\nFilters can remove certain frequency bands and leave others unchanged.<\/p>\n<h4><\/h4>\n<h4><\/h4>\n<h4><\/h4>\n<h4>Sum and difference tones<\/h4>\n<p>When two tones are played together at sufficient volume the ear hears a fictitious difference frequency.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Harmonics Musical notes are complex tones consisting of a fundamental frequency, f, and higher harmonics (or partials) that are integer multiples of the fundamental frequency (2f, 3f, 4f,&#8230;). The pitch of a note remains unchanged even if its fundamental frequency as well as its first partials are removed. Shepard\/Risset tones These paradoxical notes seem to [&hellip;]<\/p>\n","protected":false},"author":75333,"featured_media":0,"parent":64,"menu_order":9,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-275","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/pages\/275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/users\/75333"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/comments?post=275"}],"version-history":[{"count":2,"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/pages\/275\/revisions"}],"predecessor-version":[{"id":354,"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/pages\/275\/revisions\/354"}],"up":[{"embeddable":true,"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/pages\/64"}],"wp:attachment":[{"href":"https:\/\/blog.soton.ac.uk\/soundwaves\/wp-json\/wp\/v2\/media?parent=275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}