{"id":227460,"date":"2024-10-19T14:47:07","date_gmt":"2024-10-19T14:47:07","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-6840-171991\/"},"modified":"2024-10-25T08:48:11","modified_gmt":"2024-10-25T08:48:11","slug":"bs-6840-171991","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-6840-171991\/","title":{"rendered":"BS 6840-17:1991"},"content":{"rendered":"<p>This standard gives the characteristics to be specified, performance requirements and the relevant methods of measurement for electro-mechanical volume indicators. The concept of \u201cvolume\u201d is a practical way of assigning a numerical value to the magnitude of electrical speech and music programme signals.<\/p>\n<p>Since the response of the meter movement of such an indicator to the rapidly varying programme voltage is greatly dependent upon its dynamic characteristics, a standard for volume measurements shall therefore include a specification of these characteristics. The term \u201cvu\u201d (pronounced \u201cvee-you\u201d and written with lower case letters) is used to express volume in terms of vu above or below a specified reference level.<\/p>\n<p>This standard does not deal with peak programme level meters which are the subject of IEC 268-10.<\/p>\n<p>Defines the characteristics, methods of measurement, scale colours and standard scale markings, and requirements for a built-in or external attenuator for VU indicators (VU-meters) for use in recording studios and broadcast control rooms.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Sound system equipment &#8211; Methods for specifying and measuring the characteristics of standard volume indicators<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>1991<\/td>\n<td>14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":227462,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[641,2641],"product_tag":[],"class_list":{"0":"post-227460","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-160-30","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/227460","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/227462"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=227460"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=227460"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=227460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}