{"id":2436,"date":"2013-08-28T16:17:13","date_gmt":"2013-08-28T23:17:13","guid":{"rendered":""},"modified":"2020-09-13T17:04:43","modified_gmt":"2020-09-14T00:04:43","slug":"2436","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/2436","title":{"rendered":"LabQuest (original) and LabQuest Mini: Readings from my Vernier Microphone are very noisy."},"content":{"rendered":"<div class=\"notice\" style=\"border: 1px solid red; padding: 1em; text-align: center; margin-bottom: 1em;\">\n<h3>This information pertains to the original LabQuest.<\/h3>\n<p>If you have LabQuest 2 or LabQuest 3, see <a href=\"\/til\/2737\/\">this article<\/a>.<\/p>\n<\/div>\n<p>Units of the Vernier <a href=\"\/product\/microphone\/\">Microphone<\/a> (<nobr>MCA-BTA<\/nobr>), produced between April of 2007 and August 22, 2011, may exhibit a conflict with original LabQuest and LabQuest mini. Affected units may display noisy graphs when the sound source is of a low amplitude.<\/p>\n<p>To diagnose this issue, collect a sample for 0.03 s at 10,000 Hz. Then create an FFT graph. Affected units have visible noise around 3,000 Hz, which will show up as a peak in the FFT graph.<\/p>\n<p>This noise is not present in the same units when connected to LabPro.<\/p>\n<p>Microphones shipped on or after August 23, 2011 can be identified by a black product tag with white print near the BTA connector. Units with the product tag should not exhibit the noise or the 3,000 Hz peak.<\/p>\n<p>Microphones shipped after June 15 2012 have a white label with black print near the BTA connector. These microphones also are improved for use with LabQuest 2.<\/p>\n<p>If your microphone has the 3 kHz noise symptom, contact Vernier technical support.<\/p>\n<p>See also:<br \/>\n<a href=\"\/til\/667\/\">How do you change the bin size of an FFT in Graphical Analysis Pro or Logger <i>Pro<\/i>?<\/a><br \/>\n<a href=\"\/til\/2458\/\">Data collected with LabQuest Mini are very noisy, or triggering fails.<\/a><br \/>\n<\/p>","protected":false},"excerpt":{"rendered":"<p>This information pertains to the original LabQuest. If you have LabQuest 2 or LabQuest 3, see this article. Units of the Vernier , produced between&#8230;<\/p>\n","protected":false},"author":33,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[4033,4029,535,4030,3966,4032,4031],"class_list":["post-2436","post","type-post","status-publish","format-standard","hentry","tag-ecn","tag-labq-lq-mini","tag-mca-bta","tag-noise-microphone","tag-noisy","tag-redesign","tag-signal-to-noise"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/33"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=2436"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2436\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=2436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=2436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=2436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}