{"id":445611,"date":"2024-10-20T08:42:41","date_gmt":"2024-10-20T08:42:41","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-10534-22023\/"},"modified":"2024-10-26T16:12:59","modified_gmt":"2024-10-26T16:12:59","slug":"bs-en-iso-10534-22023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-10534-22023\/","title":{"rendered":"BS EN ISO 10534-2:2023"},"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
2<\/td>\nundefined <\/td>\n<\/tr>\n
4<\/td>\nEuropean foreword
Endorsement notice <\/td>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and symbols <\/td>\n<\/tr>\n
11<\/td>\n4 Principle
5 Test equipment
5.1 Construction of the impedance tube <\/td>\n<\/tr>\n
12<\/td>\n5.2 Working frequency range <\/td>\n<\/tr>\n
13<\/td>\n5.3 Length of the impedance tube
5.4 Microphones
5.5 Positions of the microphones <\/td>\n<\/tr>\n
14<\/td>\n5.6 Acoustic centre of the microphone
5.7 Test sample holder <\/td>\n<\/tr>\n
15<\/td>\n5.8 Signal processing equipment
5.9 Loudspeaker
5.10 Signal generator
5.11 Thermometer, barometer and relative humidity <\/td>\n<\/tr>\n
16<\/td>\n6 Preliminary test and measurements <\/td>\n<\/tr>\n
17<\/td>\n7 Test specimen mounting <\/td>\n<\/tr>\n
18<\/td>\n8 Test procedure
8.1 Specification of the reference plane
8.2 Determination of the sound velocity, wavelength and characteristic impedance <\/td>\n<\/tr>\n
19<\/td>\n8.3 Selection of the signal amplitude
8.4 Selection of the number of averages
8.5 Correction for microphone mismatch
8.5.1 General
8.5.2 Measurement repeated with the channels interchanged <\/td>\n<\/tr>\n
20<\/td>\n8.5.3 Predetermined calibration factor <\/td>\n<\/tr>\n
21<\/td>\n8.6 Determination of the transfer function between the two locations
8.6.1 General
8.6.2 Cross- and autospectra-based estimate <\/td>\n<\/tr>\n
23<\/td>\n8.6.3 Frequency-domain deconvolution
8.6.4 Impulse-response based estimate <\/td>\n<\/tr>\n
24<\/td>\n8.7 Determination of the reflection coefficient
8.8 Determination of the sound absorption coefficient
8.9 Determination of the specific acoustic impedance ratio
8.10 Determination of the specific acoustic admittance ratio <\/td>\n<\/tr>\n
25<\/td>\n9 Precision
10 Test report <\/td>\n<\/tr>\n
28<\/td>\nAnnex A (normative) Preliminary measurements <\/td>\n<\/tr>\n
30<\/td>\nAnnex B (normative) Procedure for the one-microphone technique <\/td>\n<\/tr>\n
31<\/td>\nAnnex C (informative) Theoretical background <\/td>\n<\/tr>\n
33<\/td>\nAnnex D (informative) Error sources <\/td>\n<\/tr>\n
35<\/td>\nAnnex E (informative) Estimation of diffuse sound absorption coefficient \ufffc of locally reacting absorbers from the results of this document <\/td>\n<\/tr>\n
36<\/td>\nAnnex F (informative) Estimation of intrinsic properties <\/td>\n<\/tr>\n
38<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Acoustics. Determination of acoustic properties in impedance tubes – Two-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>\n2023<\/td>\n40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":445621,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[267,2641],"product_tag":[],"class_list":{"0":"post-445611","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\/445611","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\/445621"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=445611"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=445611"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=445611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}