{"id":230918,"date":"2024-10-19T15:01:49","date_gmt":"2024-10-19T15:01:49","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60318-32015\/"},"modified":"2024-10-25T09:18:45","modified_gmt":"2024-10-25T09:18:45","slug":"bs-en-60318-32015","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60318-32015\/","title":{"rendered":"BS EN 60318-3:2015"},"content":{"rendered":"

This part of IEC 60318<\/span> <\/span> specifies an acoustic coupler for the measurement of supra-aural audiometric earphones in the frequency range from 125 Hz to 8 000 Hz.<\/p>\n

The sound pressure developed by an earphone is not, in general, the same in the coupler as in a person’s ear. However, the acoustic coupler can be used as an objective and reproducible means of measuring the output of supra-aural earphones. It can be used for specifying reference equivalent threshold sound pressure levels (RETSPL) for the calibration of audiometers.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
7<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
4 Construction
4.1 General <\/td>\n<\/tr>\n
8<\/td>\n4.2 Cavity dimensions <\/td>\n<\/tr>\n
9<\/td>\nFigures
Figure 1 \u2013 Dimensions of acoustic coupler <\/td>\n<\/tr>\n
10<\/td>\n4.3 Static pressure equalization
4.4 Calibrated pressure type microphone
Tables
Table 1 \u2013 Height of the coupler as a function of the acoustic volume of the microphone <\/td>\n<\/tr>\n
11<\/td>\n5 Coupling of earphone to acoustic coupler
6 Calibration
6.1 Reference environmental conditions
Figure 2 \u2013 Coupling of earphone to coupler <\/td>\n<\/tr>\n
12<\/td>\n6.2 Method of calibration
7 Maximum permitted uncertainty of measurements <\/td>\n<\/tr>\n
13<\/td>\nTable 2 \u2013 Values of maximum permitted uncertainties Umaxfor a level of confidence of approximately 95\u00a0% <\/td>\n<\/tr>\n
14<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Electroacoustics. Simulators of human head and ear – Acoustic coupler for the calibration of supra-aural earphones used in audiometry<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2015<\/td>\n16<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":230922,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[270,2641],"product_tag":[],"class_list":{"0":"post-230918","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-140-50","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\/230918","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\/230922"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=230918"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=230918"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=230918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}