{"id":81925,"date":"2024-10-17T19:00:03","date_gmt":"2024-10-17T19:00:03","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-269-2003\/"},"modified":"2024-10-24T19:48:32","modified_gmt":"2024-10-24T19:48:32","slug":"ieee-269-2003","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-269-2003\/","title":{"rendered":"IEEE 269 2003"},"content":{"rendered":"

Revision Standard – Inactive – Superseded. Practical methods for making laboratory measurements of electroacoustic characteristics of analog and digital telephones, handsets, and headsets are provided in this revised standard. The methods may also be applicable to a wide variety of other communications equipment, including cordless, wireless, and mobile communications devices. Measurement results may be used to evaluate these devices on a standardized basis. Application is in the frequency range 1008500 Hz. Revised by amendment IEEE Std 269a-2007.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nCover <\/td>\n<\/tr>\n
2<\/td>\nIEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets <\/td>\n<\/tr>\n
4<\/td>\nIntroduction
Participants <\/td>\n<\/tr>\n
6<\/td>\nContents <\/td>\n<\/tr>\n
16<\/td>\n1. Overview
1.1 Scope <\/td>\n<\/tr>\n
17<\/td>\n1.2 Purpose
1.3 Contents of standard
2. References <\/td>\n<\/tr>\n
19<\/td>\n3. Definitions <\/td>\n<\/tr>\n
22<\/td>\n4. Abbreviations, acronyms, and symbols
4.1 Abbreviations and acronyms <\/td>\n<\/tr>\n
23<\/td>\n4.2 Symbols <\/td>\n<\/tr>\n
24<\/td>\n5. Test equipment and setup
5.1 Ear simulators <\/td>\n<\/tr>\n
25<\/td>\n5.2 Mouth simulators <\/td>\n<\/tr>\n
26<\/td>\n5.3 Test fixtures <\/td>\n<\/tr>\n
30<\/td>\n5.4 Measurement microphones
5.5 Test environment <\/td>\n<\/tr>\n
32<\/td>\n5.6 Acoustic impairments <\/td>\n<\/tr>\n
33<\/td>\n6. Calibration
6.1 General
6.2 Electrical measurement instruments
6.3 Measurement microphones
6.4 Ear simulator
6.5 Measurement bandwidth and resolution
6.6 Electrical test signals <\/td>\n<\/tr>\n
34<\/td>\n6.7 Mouth simulator <\/td>\n<\/tr>\n
36<\/td>\n7. Test procedure for analog sets
7.1 General <\/td>\n<\/tr>\n
37<\/td>\n7.2 Analog DC feed circuits <\/td>\n<\/tr>\n
39<\/td>\n7.3 Analog telephone network impairments <\/td>\n<\/tr>\n
41<\/td>\n7.4 Receive <\/td>\n<\/tr>\n
43<\/td>\n7.5 Send <\/td>\n<\/tr>\n
46<\/td>\n7.6 Sidetone <\/td>\n<\/tr>\n
48<\/td>\n7.7 Overall <\/td>\n<\/tr>\n
49<\/td>\n7.8 Telephone set impedance <\/td>\n<\/tr>\n
50<\/td>\n7.9 Howling
7.10 Maximum acoustic output <\/td>\n<\/tr>\n
51<\/td>\n8. Test procedures for digital and four-wire systems
8.1 General <\/td>\n<\/tr>\n
53<\/td>\n8.2 Digital test circuits <\/td>\n<\/tr>\n
55<\/td>\n8.3 Digital telephone network impairments <\/td>\n<\/tr>\n
57<\/td>\n8.4 Receive <\/td>\n<\/tr>\n
59<\/td>\n8.5 Send <\/td>\n<\/tr>\n
62<\/td>\n8.6 Sidetone <\/td>\n<\/tr>\n
65<\/td>\n8.7 Overall <\/td>\n<\/tr>\n
66<\/td>\n8.8 Echo frequency response <\/td>\n<\/tr>\n
67<\/td>\n8.9 Temporally weighted terminal coupling loss
8.10 Stability loss <\/td>\n<\/tr>\n
68<\/td>\n8.11 Convergence time
8.12 Discontinuous speech transmission <\/td>\n<\/tr>\n
69<\/td>\n8.13 Maximum acoustic output <\/td>\n<\/tr>\n
71<\/td>\n9. Test procedures for analog four-wire handsets and headsets
9.1 General <\/td>\n<\/tr>\n
73<\/td>\n9.2 Handset and headset test circuits <\/td>\n<\/tr>\n
74<\/td>\n9.3 Receive <\/td>\n<\/tr>\n
76<\/td>\n9.4 Send <\/td>\n<\/tr>\n
79<\/td>\n9.5 Echo frequency response <\/td>\n<\/tr>\n
80<\/td>\n9.6 Maximum acoustic output <\/td>\n<\/tr>\n
82<\/td>\nAnnex A (normative)\u2014Ear simulators with flexible pinnas and positioning devices
A.1 General characteristics of the ear simulators
A.2 Differences between the two ear simulators
A.3 Handset positioning devices <\/td>\n<\/tr>\n
84<\/td>\nAnnex B (normative)\u2014Alternative ear simulators, mouth simulator, and test fixture
B.1 Alternative ear simulators <\/td>\n<\/tr>\n
85<\/td>\nB.2 Alternative mouth simulator <\/td>\n<\/tr>\n
86<\/td>\nB.3 Alternative test fixture <\/td>\n<\/tr>\n
87<\/td>\nAnnex C (normative)\u2014DRP to ERP and related translations <\/td>\n<\/tr>\n
90<\/td>\nAnnex D (normative)\u2014Conditioning for carbon transmitters <\/td>\n<\/tr>\n
91<\/td>\nAnnex E (normative)\u2014Hoth room noise <\/td>\n<\/tr>\n
93<\/td>\nAnnex F (normative)\u2014Test signals
F.1 General
F.2 Classifications
F.3 Modulation types <\/td>\n<\/tr>\n
94<\/td>\nF.4 Deterministic signals <\/td>\n<\/tr>\n
95<\/td>\nF.5 Random signals <\/td>\n<\/tr>\n
96<\/td>\nF.6 Speech-like signals <\/td>\n<\/tr>\n
97<\/td>\nF.7 Compound signals <\/td>\n<\/tr>\n
100<\/td>\nF.8 Test signal bandwidth
F.9 Signal parameter summary
F.10 Test signals published on CD-ROM
F.11 Signal and test method comparative summary <\/td>\n<\/tr>\n
102<\/td>\nAnnex G (normative)\u2014Analyis methods
G.1 General
G.2 Fast Fourier transform (FFT) and cross-spectrum analysis <\/td>\n<\/tr>\n
103<\/td>\nG.3 Real-time filter analysis (RTA) <\/td>\n<\/tr>\n
104<\/td>\nG.4 Sine-based analysis <\/td>\n<\/tr>\n
105<\/td>\nG.5 Simulated free field techniques
G.6 Measurement bandwidth <\/td>\n<\/tr>\n
106<\/td>\nG.7 Measurement resolution <\/td>\n<\/tr>\n
109<\/td>\nAnnex H (normative)\u2014Loudness rating calculations <\/td>\n<\/tr>\n
111<\/td>\nAnnex I (normative)\u2014Linearity <\/td>\n<\/tr>\n
115<\/td>\nAnnex J (normative)\u2014Distortion
J.1 Overview
J.2 Signal suitability test
J.3 Signal-to-distortion-and-noise ratio (SDN) <\/td>\n<\/tr>\n
116<\/td>\nJ.4 Sinusoidal methods <\/td>\n<\/tr>\n
118<\/td>\nJ.5 Coherence methods (N\/C ratio) <\/td>\n<\/tr>\n
120<\/td>\nAnnex K (normative)\u2014Send signal-to-noise ration
K.1 Send signal-to-noise ratio
K.2 Weighted send signal-to-noise ratio <\/td>\n<\/tr>\n
122<\/td>\nAnnex L (normative)\u2014Delay
L.1 General
L.2 Captured pulse method
L.3 Two-channel analyzer methods
L.4 Time delay spectrometry method <\/td>\n<\/tr>\n
123<\/td>\nL.5 MLS method <\/td>\n<\/tr>\n
124<\/td>\nAnnex M (normative)\u2014Sidetone echol <\/td>\n<\/tr>\n
125<\/td>\nAnnex N (normative)\u2014Maximum acoustic pressure limits
N.1 Abstract
N.2 Introduction <\/td>\n<\/tr>\n
127<\/td>\nN.3 Proposal <\/td>\n<\/tr>\n
130<\/td>\nAnnex O (normative)\u2014Temporally weighted terminal coupling loss measurement method
O.1 General
O.2 Initial signal processing
O.3 Modeling echo audibility <\/td>\n<\/tr>\n
132<\/td>\nO.4 Expressing TCL results <\/td>\n<\/tr>\n
133<\/td>\nAnnex P (normative)\u2014Temporally weighted terminal coupling loss algorith
P.1 General
P.2 TCLT algorithm <\/td>\n<\/tr>\n
139<\/td>\nAnnex Q (normative)\u2014Simulated speech generator (SSG)
Q.1 Main signal
Q.2 Modulating signal
Q.3 Combined signal <\/td>\n<\/tr>\n
140<\/td>\nQ.4 Gaussian signal generator
Q.5 Gamma function <\/td>\n<\/tr>\n
141<\/td>\nAnnex R (normative)\u2014TDS sweep with P.50 noise bursts <\/td>\n<\/tr>\n
142<\/td>\nAnnex S (informative)\u2014Use of the free field as the telephonometric reference point <\/td>\n<\/tr>\n
144<\/td>\nAnnex T (informative)\u2014Useful conversion procedures
T.1 Conversions for dBV to dBm, and for 600 and 900 <\/td>\n<\/tr>\n
145<\/td>\nT.2 Conversions for dBmp to dBrnC for electrical noise measurements
T.3 Loudness rating conversions
T.4 Acoustic sound pressure conventions <\/td>\n<\/tr>\n
146<\/td>\nAnnex U (informative)\u2014Loudness balance subjective test procedure
U.1 Introduction
U.2 Loudness balance test procedure <\/td>\n<\/tr>\n
147<\/td>\nU.3 Example test circuit <\/td>\n<\/tr>\n
148<\/td>\nU.4 Estimate of test headset receive characteristics <\/td>\n<\/tr>\n
149<\/td>\nAnnex V (informative)\u2014Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
IEEE<\/b><\/a><\/td>\n2003<\/td>\n149<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":81926,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-81925","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\/81925","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\/81926"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=81925"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=81925"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=81925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}