{"id":361899,"date":"2024-10-20T01:38:10","date_gmt":"2024-10-20T01:38:10","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-20-30385866-dc-2020\/"},"modified":"2024-10-26T02:33:04","modified_gmt":"2024-10-26T02:33:04","slug":"bsi-20-30385866-dc-2020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-20-30385866-dc-2020\/","title":{"rendered":"BSI 20\/30385866 DC 2020"},"content":{"rendered":"<p>This document describes a test method for measuring <i>in situ<\/i> the sound absorption coefficient of road surfaces as a function of frequency in the range from 250&nbsp;Hz to 4&nbsp;kHz.<\/p>\n<p>Normal incidence is assumed. However, the test method can be applied at oblique incidence although with some limitations (see <span class=\"xref\">Annex&nbsp;F<\/span>). The test method is intended for the following applications:<\/p>\n<ul>\n<li>\n<p>determination of the sound absorption properties of road surfaces in actual use;<\/p>\n<\/li>\n<li>\n<p>comparison of sound absorption design specifications of road surfaces with actual performance data of the surface after completion of the construction work.<\/p>\n<\/li>\n<\/ul>\n<p>The complex reflection factor can also be determined by this method.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>BS ISO 13472-1. Acoustics. Measurement of sound absorption properties of road surfaces in situ &#8211; Part 1. Extended surface method<\/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>2020<\/td>\n<td>36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":361905,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1301,2641],"product_tag":[],"class_list":{"0":"post-361899","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-93-080-20","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\/361899","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\/361905"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=361899"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=361899"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=361899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}