{"id":82675,"date":"2024-10-18T03:07:44","date_gmt":"2024-10-18T03:07:44","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-661-1979\/"},"modified":"2024-10-24T19:51:01","modified_gmt":"2024-10-24T19:51:01","slug":"ieee-661-1979","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-661-1979\/","title":{"rendered":"IEEE 661 1979"},"content":{"rendered":"

New IEEE Standard – Active. To describe a practical and reproducible method of determining the loudness ratings of telephone connections. Loudness ratings may be measured directly using appropriate test instruments and facilities, as specified in this standard, or may be computed using the amplitude-frequency characteristic of the connection measured in accordance with IEEE Std 269-1971. .<\/p>\n

PDF Catalog<\/h4>\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
5<\/td>\n1 Introduction <\/td>\n<\/tr>\n
6<\/td>\n2 ScopeandPurpose
Definitions
3.1 LoudnessRating
3.2 Reference System <\/td>\n<\/tr>\n
7<\/td>\n3.3 Objective Loudness Rating (OLR)
3.4 Voltage and Pressure Levels
3.5 Overall Objective Loudness Rating (OOLR)
3.6 Transmitting Objective Loudness Rating (TOLR)
3.7 Receiving Objective Loudness Rating (ROLR)
3.8 Sidetone Objective Loudness Rating (SOLR)
3.9 Electrical Objective Loudness Rating (EOLR)
3.10 Source\/Load Impedance
3.11 LoudnessEquation <\/td>\n<\/tr>\n
8<\/td>\n4 References
5 Instrumental Method
5.1 General
5.2 Test Equipment <\/td>\n<\/tr>\n
10<\/td>\n5.3 Meamringsystem
Fig 1 H-Pad Circuit <\/td>\n<\/tr>\n
11<\/td>\nFig 2 Sending End of Measuring System
Fig 3 Receiving End of Measuring System <\/td>\n<\/tr>\n
13<\/td>\n5.4 Calibration
5.5 Testprocedure <\/td>\n<\/tr>\n
14<\/td>\n6 Computational Method <\/td>\n<\/tr>\n
15<\/td>\nFig 6 Graphical Loudness Computation Form <\/td>\n<\/tr>\n
16<\/td>\nExample of Computation of Transmitting Objective Loudness Rating
Example of Computation of Receiving Objective Loudness Rating <\/td>\n<\/tr>\n
17<\/td>\nAppendix A Loudness Rating Method
Fig A1 Computation of Speech Loudness <\/td>\n<\/tr>\n
19<\/td>\nAppendix B Weighted Acoustic Source Signal
aTalker <\/td>\n<\/tr>\n
20<\/td>\nAppendix C Weighted Electrical Source Signal <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Standard Method for Determining Objective Loudness Ratings of Telephone Connections<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
IEEE<\/b><\/a><\/td>\n1979<\/td>\n20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":82676,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-82675","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ieee","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\/82675","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\/82676"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=82675"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=82675"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=82675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}