{"id":197409,"date":"2024-10-19T12:33:53","date_gmt":"2024-10-19T12:33:53","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asa-s1-18-2018\/"},"modified":"2024-10-25T05:07:33","modified_gmt":"2024-10-25T05:07:33","slug":"asa-s1-18-2018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asa\/asa-s1-18-2018\/","title":{"rendered":"ASA S1.18 2018"},"content":{"rendered":"

None<\/p>\n

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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
13<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
14<\/td>\n3 Terms and definitions
4 Measurement method
4.1 Recommended geometries <\/td>\n<\/tr>\n
15<\/td>\n4.2 Time convention <\/td>\n<\/tr>\n
16<\/td>\n4.3 Measurement procedure
4.4 Ground and environmental conditions <\/td>\n<\/tr>\n
17<\/td>\n4.5 Determination of the normalized specific acoustic impedance ratio <\/td>\n<\/tr>\n
19<\/td>\n4.6 Procedure to determine best fit in Step 1 <\/td>\n<\/tr>\n
20<\/td>\n4.7 Minimization procedure for Step 2 <\/td>\n<\/tr>\n
21<\/td>\n5 Required instruments for measuring ground impedance outdoors
5.1 Sound source
5.2 Microphones
5.3 Calibration <\/td>\n<\/tr>\n
22<\/td>\n5.4 Sound level meter\/analyzer
5.5 Miscellaneous
5.6 Configuration of measuring system
5.7 Wind speed
6 Measurement
6.1 Area of ground
6.2 Data collection <\/td>\n<\/tr>\n
23<\/td>\n7 Data reduction
7.1 Corrections
7.2 Experimental error <\/td>\n<\/tr>\n
24<\/td>\n8 Reporting
8.1 Introductory information
8.2 Documentation of the instrumentation
8.3 Meteorological data
8.4 Impedance values
8.5 Other observations <\/td>\n<\/tr>\n
25<\/td>\n9 Templates for obtaining normalized surface impedance model parameters
9.1 Templates for the one-parameter impedance model <\/td>\n<\/tr>\n
26<\/td>\n9.2 Templates for the two-parameter normalized surface impedance model <\/td>\n<\/tr>\n
33<\/td>\nAnnex A (informative) Worked examples of procedure
A.1 Example 1: Cricket field at the Open University, UK <\/td>\n<\/tr>\n
38<\/td>\niv \u00a9 Acoustical Society of America 2018 \u2013 All rights reserved
\n A.2 Example 2: Institutional grass at the National Research Council, Canada <\/td>\n<\/tr>\n
42<\/td>\nA.3 Example 3: University lawn at Oldenburgh in Germany <\/td>\n<\/tr>\n
46<\/td>\nA.4 Example 4: Granite gravel road on U.S. Army Research Laboratory testing facility <\/td>\n<\/tr>\n
49<\/td>\nAnnex B (informative) Example impedance parameters
B.1 One-parameter model
B.2 Two-parameter model <\/td>\n<\/tr>\n
50<\/td>\nAnnex C (informative) Formulae for the complex sound pressure ratio <\/td>\n<\/tr>\n
52<\/td>\nAnnex D (informative) Mathematical functions <\/td>\n<\/tr>\n
54<\/td>\nAnnex E (informative) Software for deduction of surface impedance according to ANSI\/ASA S1.18-
\n 2018 <\/td>\n<\/tr>\n
55<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ANSI\/ASA S1.18-2018 American National Standard Method for Determining the Acoustic Impedance of Ground Surfaces<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASA<\/b><\/a><\/td>\n2018<\/td>\n58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":197413,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2652],"product_tag":[],"class_list":{"0":"post-197409","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-asa","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/197409","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\/197413"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=197409"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=197409"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=197409"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}