{"id":197472,"date":"2024-10-19T12:34:09","date_gmt":"2024-10-19T12:34:09","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/asa-s12-51-2012\/"},"modified":"2024-10-25T05:07:45","modified_gmt":"2024-10-25T05:07:45","slug":"asa-s12-51-2012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/asa\/asa-s12-51-2012\/","title":{"rendered":"ASA S12.51 2012"},"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\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
1.1 General
1.2 Types of noise and noise sources
1.3 Reverberation test room <\/td>\n<\/tr>\n
14<\/td>\n1.4 Measurement uncertainty
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
19<\/td>\n4 Reference meteorological conditions
5 Reverberation test room
5.1 General
5.2 Volume and shape of test room
5.3 Sound absorption of test room <\/td>\n<\/tr>\n
20<\/td>\n5.4 Criteria for background noise <\/td>\n<\/tr>\n
22<\/td>\n5.5 Atmospheric temperature, humidity and pressure <\/td>\n<\/tr>\n
23<\/td>\n6 Instrumentation and measurement equipment
6.1 General
6.2 Calibration <\/td>\n<\/tr>\n
24<\/td>\n7 Definition, location, installation, and operation of noise source under test
7.1 General
7.2 Auxiliary equipment
7.3 Noise source location
7.4 Installation and mounting conditions <\/td>\n<\/tr>\n
25<\/td>\n7.5 Operation of source during test <\/td>\n<\/tr>\n
26<\/td>\n8 Measurements in the reverberation test room
8.1 General
8.2 Initial location of the noise source under test
8.3 Microphone positions <\/td>\n<\/tr>\n
28<\/td>\n8.4 Measurement of sound pressure levels <\/td>\n<\/tr>\n
31<\/td>\n8.5 Measurement of single event time-integrated sound pressure levels <\/td>\n<\/tr>\n
32<\/td>\n8.6 Measurement of sound pressure levels from the reference sound source for the comparison
\n method <\/td>\n<\/tr>\n
33<\/td>\n8.7 Measurement of reverberation time
8.8 Measurement of meteorological conditions
9 Determination of sound power levels and sound energy levels
9.1 Determination of sound power levels <\/td>\n<\/tr>\n
38<\/td>\n9.2 Determination of sound energy levels <\/td>\n<\/tr>\n
42<\/td>\n9.3 A-weighted sound power level and sound energy level
10 Measurement uncertainty
10.1 Methodology <\/td>\n<\/tr>\n
43<\/td>\n10.2 Determination of .omc <\/td>\n<\/tr>\n
44<\/td>\n10.3 Determination of .R0 <\/td>\n<\/tr>\n
45<\/td>\n10.4 Typical upper bound values of . R0 <\/td>\n<\/tr>\n
46<\/td>\n10.5 Total standard deviation . tot and expanded measurement uncertainty, U
11 Information to be recorded
11.1 General
11.2 Noise source under test <\/td>\n<\/tr>\n
47<\/td>\n11.3 Test environment
11.4 Instrumentation
11.5 Acoustical data <\/td>\n<\/tr>\n
48<\/td>\n12 Test report <\/td>\n<\/tr>\n
49<\/td>\nAnnex A (informative) Guidelines for the design of reverberation test rooms
A.1 General
A.2 Volume of reverberation test room
A.3 Shape of reverberation test room <\/td>\n<\/tr>\n
50<\/td>\nA.4 Absorption of reverberation test room <\/td>\n<\/tr>\n
51<\/td>\nAnnex B (informative) Guidelines for the design of rotating diffusing vanes <\/td>\n<\/tr>\n
52<\/td>\nAnnex C (normative) Reverberation test room qualification procedure for the measurement of
\n broad-band sound
C.1 Introduction
C.2 Instrumentation and equipment
C.3 Test procedure <\/td>\n<\/tr>\n
53<\/td>\nC.4 Calculation
C.5 Qualification <\/td>\n<\/tr>\n
54<\/td>\nAnnex D (normative) Reverberation test room qualification procedure for the measurement of
\n discrete-frequency components
D.1 Introduction <\/td>\n<\/tr>\n
55<\/td>\nD.2 General
D.3 Instrumentation and measurement equipment
D.4 Loudspeaker test <\/td>\n<\/tr>\n
56<\/td>\nD.5 Room test
D.6 Computational procedure <\/td>\n<\/tr>\n
57<\/td>\nD.7 Qualification
D.8 Multiple source locations <\/td>\n<\/tr>\n
59<\/td>\nAnnex E (informative) Extension of frequency range to frequencies below 100 Hz
E.1 Additional frequency range
E.2 Supplement to Table 6
E.3 Supplement to Table 1 (Minimum volume of the reverberation test room as a function of the
\n lowest frequency band of interest
E.4 Supplement to Table 4 (Minimum number of microphone positions for the measurement of
\n sound pressure level) and Table 5 (Minimum number of source locations for the
\n measurement of sound pressure level <\/td>\n<\/tr>\n
60<\/td>\nE.5 Supplement to Table C.1
E.6 Supplement to Tables D.1 and D.2 <\/td>\n<\/tr>\n
62<\/td>\nAnnex F (normative) Calculation of octave band sound power levels and sound energy levels, Aweighted
\n sound power levels and A-weighted sound energy levels from one-third-octave
\n band levels
F.1 Sound power levels <\/td>\n<\/tr>\n
63<\/td>\nF.2 Sound energy levels <\/td>\n<\/tr>\n
64<\/td>\nF.3 Values of k and Ck for use in calculations <\/td>\n<\/tr>\n
66<\/td>\nAnnex G (informative) Guidelines on the development of information on measurement uncertainty
G.1 General
G.2 Considerations on the total standard deviation . tot <\/td>\n<\/tr>\n
67<\/td>\nG.3 Considerations on . omc <\/td>\n<\/tr>\n
68<\/td>\nG.4 Considerations on . R0 <\/td>\n<\/tr>\n
79<\/td>\nG.5 Combined standard uncertainty
G.6 Measurement uncertainty based on reproducibility data <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

ANSI\/ASA S12.51-2012 \/ ISO 3741:2010 (R2017) American National Standard Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Precision methods for reverberation test rooms (a nationally adopted international standard)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASA<\/b><\/a><\/td>\n2012<\/td>\n84<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":197476,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2652],"product_tag":[],"class_list":{"0":"post-197472","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\/197472","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\/197476"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=197472"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=197472"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=197472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}