{"id":409462,"date":"2024-10-20T05:35:38","date_gmt":"2024-10-20T05:35:38","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-22-30427270-dc-2022\/"},"modified":"2024-10-26T10:15:41","modified_gmt":"2024-10-26T10:15:41","slug":"bsi-22-30427270-dc-2022","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-22-30427270-dc-2022\/","title":{"rendered":"BSI 22\/30427270 DC 2022"},"content":{"rendered":"

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\n30427270-NC.pdf <\/td>\n<\/tr>\n
3<\/td>\nISO_DIS 10534-2 ed.2 – id.81294 Enquiry PDF (en).pdf <\/td>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\n1 Scope
2 Terms, Definitions and symbols <\/td>\n<\/tr>\n
10<\/td>\n3 Principle <\/td>\n<\/tr>\n
11<\/td>\n4 Test equipment
4.1 Construction of the impedance tube <\/td>\n<\/tr>\n
12<\/td>\n4.2 Working frequency range
4.3 Length of the impedance tube <\/td>\n<\/tr>\n
13<\/td>\n4.4 Microphones
4.5 Positions of the microphones <\/td>\n<\/tr>\n
14<\/td>\n4.6 Acoustic centre of the microphone
4.7 Test sample holder
4.8 Signal processing equipment <\/td>\n<\/tr>\n
15<\/td>\n4.9 Loudspeaker
4.10 Signal generator
4.11 Thermometer, barometer and hygrometer
5 Preliminary test and measurements <\/td>\n<\/tr>\n
16<\/td>\n6 Test specimen mounting <\/td>\n<\/tr>\n
17<\/td>\n7 Test procedure
7.1 Specification of the reference plane
7.2 Determination of the sound velocity, wavelength and characteristic impedance <\/td>\n<\/tr>\n
18<\/td>\n7.3 Selection of the signal amplitude
7.4 Selection of the number of averages
7.5 Correction for microphone mismatch <\/td>\n<\/tr>\n
19<\/td>\n7.5.1 Measurement repeated with the microphones interchanged <\/td>\n<\/tr>\n
20<\/td>\n7.5.2 Predetermined calibration factor <\/td>\n<\/tr>\n
21<\/td>\n7.6 Determination of the transfer function between the two locations <\/td>\n<\/tr>\n
22<\/td>\n7.7 Determination of the reflection coefficient
7.8 Determination of the sound absorption coefficient
7.9 Determination of the specific acoustic impedance ratio <\/td>\n<\/tr>\n
23<\/td>\n7.10 Determination of the specific acoustic admittance ratio
8 Precision
9 Test report <\/td>\n<\/tr>\n
27<\/td>\nAnnex\u20acA (normative) Preliminary measurements <\/td>\n<\/tr>\n
29<\/td>\nAnnex\u20acB (normative) Procedure for the one-microphone technique <\/td>\n<\/tr>\n
30<\/td>\nAnnex\u20acC (informative) Theoretical background <\/td>\n<\/tr>\n
32<\/td>\nAnnex\u20acD (informative) Error sources <\/td>\n<\/tr>\n
34<\/td>\nAnnex\u20acE (informative) Estimation of diffuse sound absorption coefficient ast of locally reacting absorbers from the results of this part of ISO 10534 <\/td>\n<\/tr>\n
35<\/td>\nAnnex\u20acF (informative) Estimation of intrinsic properties <\/td>\n<\/tr>\n
37<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

BS EN ISO 10534-2. Acoustics. Determination of properties in impedance tubes – Part 2. 2-microphone technique for normal sound absorption coefficient and normal surface impedance<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2022<\/td>\n37<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":409471,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[267,2641],"product_tag":[],"class_list":{"0":"post-409462","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-140-01","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\/409462","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\/409471"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=409462"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=409462"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=409462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}