{"id":430917,"date":"2024-10-20T07:25:24","date_gmt":"2024-10-20T07:25:24","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-60268-232023\/"},"modified":"2024-10-26T14:06:29","modified_gmt":"2024-10-26T14:06:29","slug":"bs-en-iec-60268-232023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-60268-232023\/","title":{"rendered":"BS EN IEC 60268-23:2023"},"content":{"rendered":"

IEC 60268-23:2023 specifies acoustical measurement methods that apply to TV sets, monitors with built-in loudspeakers, and other audio devices having similar acoustical properties (e.g. flat-panel loudspeakers). The acoustical measurements are performed under free-field conditions and in-situ. This document does not assess the perception and cognitive evaluation of the reproduced sound, nor the impact of perceived sound quality.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
6<\/td>\nBlank Page <\/td>\n<\/tr>\n
7<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
12<\/td>\nFOREWORD <\/td>\n<\/tr>\n
14<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
15<\/td>\n1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms <\/td>\n<\/tr>\n
16<\/td>\n3.2 Abbreviated terms <\/td>\n<\/tr>\n
17<\/td>\n4 Type description
5 Physical characteristics
5.1 Dimensions
5.2 Mass
6 Conditions
6.1 Normal measuring conditions
Figures
Figure 1 \u2013Test signal scope <\/td>\n<\/tr>\n
18<\/td>\n6.2 Rated conditions
6.3 Rated frequency range
6.4 Climatic conditions
7 Test signals
7.1 General
7.2 Sinusoidal chirp signal
7.3 Steady-state single-tone signal <\/td>\n<\/tr>\n
19<\/td>\n7.4 Steady-state two-tone signal
7.5 Sparse multi-tone complex
7.6 Broadband noise signal
7.7 Narrow-band noise signal
7.8 Hann-burst signal
7.9 Impulsive signal
8 Acoustical environment
8.1 General
8.2 Free-field conditions
8.3 Simulated free-field conditions <\/td>\n<\/tr>\n
20<\/td>\n8.4 In-situ environment
8.5 Listening room
9 Measurement equipment
10 Positioning of the EUT
10.1 Reference plane and normal vector
10.2 Reference point <\/td>\n<\/tr>\n
21<\/td>\n10.3 Reference axis
10.4 Orientation vector
Figure 2 \u2013Recommended position and orientation of the EUT <\/td>\n<\/tr>\n
22<\/td>\nFigure 3 \u2013 Measuring the horizontal directivity in spherical coordinates by rotating the EUT (e.g., OLED TV) in upright position
Figure 4 \u2013 Measuring the vertical directivity in spherical coordinates by rotating the tilted EUT (e.g. OLED TV) <\/td>\n<\/tr>\n
23<\/td>\n10.5 Horizontal and Vertical Trajectories
11 Measuring distance between EUT and microphone
11.1 Far-field conditions
11.2 Near-field conditions
Tables
Table 1 \u2013 Recommended coordinates of the trajectories at distance rD <\/td>\n<\/tr>\n
24<\/td>\n12 Mounting of the EUT
12.1 General
12.2 Mounting methods
12.2.1 Stand-type
12.2.2 Wall mount-type
Figure 5 \u2013 Example for stand-type <\/td>\n<\/tr>\n
25<\/td>\n12.3 Mounting for free-field conditions
12.3.1 General
12.3.2 EUT rotating condition
12.3.3 Microphone rotating condition
13 Rated ambient conditions
13.1 Temperature ranges
13.1.1 Performance limited temperature range
Figure 6 \u2013 Example for wall mount-type. <\/td>\n<\/tr>\n
26<\/td>\n13.1.2 Damage limited temperature range
13.2 Humidity ranges
13.2.1 Relative humidity range
13.2.2 Damage limited humidity range
14 Evaluation point and distance
14.1 Evaluation point
14.2 Evaluation distance
Figure 7 \u2013 Evaluation point and distance (centre) <\/td>\n<\/tr>\n
27<\/td>\n15 Free-field measurements
15.1 General
15.2 On-axis SPL FR
15.2.1 Definition
15.2.2 Measurement methods
15.2.3 Reporting
Table 2 \u2013 Evaluation distance reference standard <\/td>\n<\/tr>\n
28<\/td>\n15.3 Spatial transfer function
15.3.1 Definition
15.3.2 Measurement method <\/td>\n<\/tr>\n
29<\/td>\n15.3.3 Reporting
15.4 Sound power response
15.4.1 Definition
Figure 8 \u2013 SPL distribution of the direct sound represented in colour in 3D <\/td>\n<\/tr>\n
30<\/td>\n15.4.2 Measurement methods
15.4.3 Reporting <\/td>\n<\/tr>\n
31<\/td>\n15.5 Directional characteristics
15.5.1 General
Figure 9 \u2013 Measurement locations at vertical and horizontal trajectories at distance rd <\/td>\n<\/tr>\n
32<\/td>\n15.5.2 Measurement methods
15.5.3 Post-processing <\/td>\n<\/tr>\n
33<\/td>\nFigure 10 \u2013 Measurement locations at listening window <\/td>\n<\/tr>\n
34<\/td>\nFigure 11 \u2013 Measurement locations at equivalent sound power
Table 3 \u2013 Weights for polar angle \u03b8 at 10\u00b0 Increments <\/td>\n<\/tr>\n
35<\/td>\n15.5.4 Reporting
16 In-situ testing
16.1 General
Figure 12 \u2013 Example for reporting the directional characteristics measured at distance rd. <\/td>\n<\/tr>\n
36<\/td>\n16.2 In-situ transfer function
16.2.1 Definition <\/td>\n<\/tr>\n
37<\/td>\n16.2.2 Measurement method
Figure 13 \u2013 Modelling the sound reproduction under in-situ conditions <\/td>\n<\/tr>\n
38<\/td>\n16.2.3 Reporting
16.3 Room transfer function
16.3.1 Definition
16.3.2 Measurement method
Figure 14 \u2013 Example of time-frequency analysis (spectrogram)applied to reflected sound impulse response measured ata distance r = 1,5 m from the EUT in an office room <\/td>\n<\/tr>\n
39<\/td>\n16.4 Reflected sound SPL response
16.4.1 Definition
16.4.2 Measurement method <\/td>\n<\/tr>\n
40<\/td>\n16.4.3 Reporting
16.5 In-situ SPL FR
16.5.1 Definition
16.5.2 Measurement methods <\/td>\n<\/tr>\n
41<\/td>\n16.5.3 Reporting
Figure 15 \u2013 SPL FR of the in-situ condition. <\/td>\n<\/tr>\n
42<\/td>\n17 Mean SPL in an acoustical zone
17.1 General
17.2 Definition <\/td>\n<\/tr>\n
43<\/td>\n17.3 Measurement
17.4 Numerical prediction
17.5 Reporting
18 FR characteristics
18.1 General <\/td>\n<\/tr>\n
44<\/td>\n18.2 Mean value of SPL in a rated frequency range
18.2.1 Definition and unit
18.2.2 Setup
18.2.3 Procedure
18.2.4 Analysis <\/td>\n<\/tr>\n
45<\/td>\n18.2.5 Reporting
18.3 Effective frequency range (EFR)
18.3.1 Definition and unit
18.3.2 Setup
18.3.3 Procedure
Figure 16 \u2013 Mean value of SPL at rated frequency range
Table 4 \u2013 Worked example for mean value of SPL <\/td>\n<\/tr>\n
46<\/td>\n18.3.4 Analysis
18.3.5 Reporting
Figure 17 \u2013 Effective Frequency Range at Frequency Response
Table 5 \u2013 Worked example for effective frequency range <\/td>\n<\/tr>\n
47<\/td>\n18.4 Spectral balance (SB)
18.4.1 Definition and unit
18.4.2 Setup
18.4.3 Procedure
18.4.4 Analysis <\/td>\n<\/tr>\n
48<\/td>\n18.4.5 Reporting
18.5 Regression line deviation (RLD)
18.5.1 Definition and unit
18.5.2 Setup
18.5.3 Procedure
Table 6 \u2013 Worked example for spectral balance <\/td>\n<\/tr>\n
49<\/td>\n18.5.4 Analysis
18.5.5 Reporting
Figure 18 \u2013 Regression line deviation at rated frequency range
Table 7 \u2013 Worked example for RLD <\/td>\n<\/tr>\n
50<\/td>\n18.6 Narrow band variation (NBV)
18.6.1 Definition and unit
18.6.2 Setup
18.6.3 Procedure
18.6.4 Analysis <\/td>\n<\/tr>\n
51<\/td>\n18.6.5 Reporting
19 Large-signal characteristics
19.1 Modelling at high amplitudes
Figure 19 \u2013 Loudspeaker model considering the dominant signal distortion at high amplitudes
Table 8 \u2013 Worked example for NBV <\/td>\n<\/tr>\n
52<\/td>\n19.2 Noise spectrum
19.2.1 Definition and measurement
19.2.2 Reporting
19.3 Short-term amplitude compression
19.3.1 Definition and unit
19.3.2 Setup
19.3.3 Procedure <\/td>\n<\/tr>\n
53<\/td>\n19.3.4 Analysis
19.3.5 Reporting
19.4 Multi-tone distortion
19.4.1 Multi-tone distortion spectrum <\/td>\n<\/tr>\n
54<\/td>\nFigure 20 \u2013 SPL spectrum of the reproduced multi-tone stimulus (MDS) at full FFT resolution comprising the fundamental components at the excited tones and the distortion components at other frequencies <\/td>\n<\/tr>\n
55<\/td>\n19.4.2 Absolute multi-tone distortion <\/td>\n<\/tr>\n
56<\/td>\n19.4.3 Relative multi-tone distortion
Figure 21 \u2013 SPL of the fundamental, multi-tone distortion and noise floor integrated into frequency bands at the excitation frequencies of the multi-tone stimulus <\/td>\n<\/tr>\n
57<\/td>\n19.4.4 Total multi-tone distortion ratio
Figure 22 \u2013 Relative multi-tone distortion and relative noise floor in decibel versus excitation frequencies fi. <\/td>\n<\/tr>\n
58<\/td>\n19.5 Harmonic distortion in sound pressure output
19.5.1 Definition and unit <\/td>\n<\/tr>\n
59<\/td>\n19.5.2 Setup
19.5.3 Procedure and analysis <\/td>\n<\/tr>\n
60<\/td>\n19.5.4 Reporting
Figure 23 \u2013 Total harmonic distortion (THD) referred to the fundamental component measured at three distances on the reference axis <\/td>\n<\/tr>\n
61<\/td>\n19.6 Equivalent input total harmonic distortion
19.6.1 Definition and unit
Figure 24 \u2013 SPL FR of the fundamental component, total harmonic components (), and the noise floor <\/td>\n<\/tr>\n
62<\/td>\n19.6.2 Setup
19.6.3 Procedure
19.6.4 Analysis
Figure 25 \u2013 Signal flow chart illustrating the generation of the equivalent input distortion by inverse filtering the sound pressure signal measured at three different points in an in-situ environment (office) <\/td>\n<\/tr>\n
63<\/td>\n19.6.5 Reporting
Figure 26 \u2013 Equivalent input total harmonic distortion (EITHD) in percent versus excitation frequency measured at three distances on the reference axis in an in-situ environment <\/td>\n<\/tr>\n
64<\/td>\n19.7 Impulsive distortion
19.7.1 Definition and unit
19.7.2 Setup
19.7.3 Procedure
19.7.4 Analysis <\/td>\n<\/tr>\n
65<\/td>\n19.7.5 Reporting
19.8 Rated maximum input value
19.8.1 Definition and unit
19.8.2 Setup <\/td>\n<\/tr>\n
66<\/td>\n19.8.3 Procedure <\/td>\n<\/tr>\n
67<\/td>\n19.8.4 Analysis
19.8.5 Reporting
19.9 Rated maximum SPL
19.9.1 Definition and unit
19.9.2 Setup
19.9.3 Procedure
Table 9 \u2013 Worked example for rated maximum input value <\/td>\n<\/tr>\n
68<\/td>\nTable 10 \u2013 A Worked example for Rated maximum SPL <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Sound system equipment – TVs and monitors. Loudspeaker systems<\/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>\n72<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":430927,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[637,2641],"product_tag":[],"class_list":{"0":"post-430917","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-160-01","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\/430917","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\/430927"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=430917"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=430917"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=430917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}