{"id":228560,"date":"2024-10-19T14:51:40","date_gmt":"2024-10-19T14:51:40","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60268-42010\/"},"modified":"2024-10-25T08:57:20","modified_gmt":"2024-10-25T08:57:20","slug":"bs-en-60268-42010","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60268-42010\/","title":{"rendered":"BS EN 60268-4:2010"},"content":{"rendered":"

This part of IEC 60268 specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also details the characteristics to be specified by the manufacturer.<\/p>\n

It applies to sound system microphones for all applications for speech and music. It does not apply to measurement microphones, but it does apply to each audio channel of microphones having more than one channel, for example for stereo or similar use. It is also applicable to flush-mounted microphones and to the analogue characteristics of microphones with digital audio output.<\/p>\n

For the purposes of this International Standard, a microphone includes all such devices as transformers, pre-amplifiers, or other elements that form an integral part of the microphone, up to the output terminals specified by the manufacturer.<\/p>\n

\n

NOTE The characteristics specified in this standard do not completely describe the subjective response of the microphone. Further work is necessary to find new definitions and measurement procedures for a later replacement by objective characteristics of at least some of the subjective descriptions used to describe microphone performance.<\/p>\n<\/blockquote>\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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
7<\/td>\nCONTENTS <\/td>\n<\/tr>\n
11<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
12<\/td>\n3 General conditions
3.1 General
3.2 Measurement conditions <\/td>\n<\/tr>\n
14<\/td>\n4 Particular conditions
4.1 Pre-conditioning
4.2 Sound source
4.3 Measurement of sound pressure
4.4 Voltage measuring system
4.5 Acoustical environment <\/td>\n<\/tr>\n
17<\/td>\n4.6 Methods of measuring frequency response
Tables
Table 1 \u2013 Reverberation time of the empty room <\/td>\n<\/tr>\n
18<\/td>\n4.7 Overall accuracy
4.8 Graphical presentation of results <\/td>\n<\/tr>\n
19<\/td>\n5 Type description (acoustical behaviour)
5.1 Principle of the transducer
5.2 Type of microphone
5.3 Type of directional response characteristics
6 Terminals and controls
6.1 Marking
6.2 Connectors and electrical interface values
7 Reference point and axis
7.1 Reference point
7.2 Reference axis <\/td>\n<\/tr>\n
20<\/td>\n8 Rated power supply
8.1 Characteristic to be specified
8.2 Method of measurement
9 Electrical impedance
9.1 Internal impedance <\/td>\n<\/tr>\n
21<\/td>\n9.2 Rated impedance
9.3 Minimum permitted load impedance
10 Sensitivity
10.1 General <\/td>\n<\/tr>\n
22<\/td>\n10.2 Sensitivities with respect to acoustical environment <\/td>\n<\/tr>\n
24<\/td>\n10.3 Sensitivities with respect to nature of signal <\/td>\n<\/tr>\n
25<\/td>\n11 Response
11.1 Frequency response
Table 2 \u2013 Speech power weighting factor at octave-band centre frequencies <\/td>\n<\/tr>\n
26<\/td>\n11.2 Effective frequency range
12 Directional characteristics
12.1 Directional pattern <\/td>\n<\/tr>\n
28<\/td>\n12.2 Directivity index
12.3 Front-to-rear sensitivity index (0\u00b0 \u2013 180\u00b0)
12.4 Noise-cancelling index <\/td>\n<\/tr>\n
29<\/td>\n12.5 Special characteristics for stereo microphones <\/td>\n<\/tr>\n
30<\/td>\n13 Amplitude non-linearity
13.1 General
13.2 Total harmonic distortion <\/td>\n<\/tr>\n
31<\/td>\n13.3 Harmonic distortion of the nth order (n = 2, 3,…) <\/td>\n<\/tr>\n
32<\/td>\n13.4 Difference frequency distortion of second order
14 Limiting characteristics
14.1 Rated maximum permissible peak sound pressure <\/td>\n<\/tr>\n
33<\/td>\n14.2 Overload sound pressure
15 Balance
15.1 Balance of the microphone output
15.2 Balance under working conditions
Figures
Figure 1 \u2013 Balance of the output <\/td>\n<\/tr>\n
34<\/td>\n16 Equivalent sound pressure level due to inherent noise
16.1 Characteristic to be specified
16.2 Method of measurement
Figure 2 \u2013 Balance under working conditions <\/td>\n<\/tr>\n
35<\/td>\n17 Ambient conditions
17.1 General
17.2 Pressure range
17.3 Temperature range
17.4 Relative humidity range
18 External influences
18.1 General <\/td>\n<\/tr>\n
36<\/td>\n18.2 Equivalent sound pressure due to external magnetic fields
18.3 Equivalent sound pressure due to mechanical vibration <\/td>\n<\/tr>\n
37<\/td>\n18.4 Equivalent sound pressure due to wind <\/td>\n<\/tr>\n
38<\/td>\nFigure 3 \u2013 Measurement set-up for wind influence <\/td>\n<\/tr>\n
39<\/td>\nFigure 4 \u2013 Wind generators, type 1 (Figure 4a) and type 2 (Figure 4b)) <\/td>\n<\/tr>\n
40<\/td>\n18.5 Transient equivalent sound pressure due to “pop” effect <\/td>\n<\/tr>\n
41<\/td>\nFigure 5 \u2013 Electrical and mechanical set-up for the measuring of the “pop” effect <\/td>\n<\/tr>\n
42<\/td>\n18.6 Equivalent sound pressure due to electromagnetic interference
Table 3 \u2013 Reference signal and characteristics <\/td>\n<\/tr>\n
43<\/td>\n18.7 Electrostatic discharge
19 Magnetic stray field
19.1 Characteristic to be specified
19.2 Method of measurement
20 Physical characteristics
20.1 Dimensions
20.2 Weight
20.3 Cables and connectors
21 Classification of the characteristics to be specified
21.1 General <\/td>\n<\/tr>\n
45<\/td>\nTable 4 \u2013 Classification of characteristics <\/td>\n<\/tr>\n
46<\/td>\nAnnex A (normative) Sound insulation device
Figure A.1 \u2013 Sound insulation device <\/td>\n<\/tr>\n
47<\/td>\nAnnex B (informative) Simplified procedure for \u201cpop\u201d measurements <\/td>\n<\/tr>\n
48<\/td>\nFigure B.1 \u2013 Measurement set-up <\/td>\n<\/tr>\n
49<\/td>\nFigure B.2 \u2013 Test fixture for the sound field sensitivity <\/td>\n<\/tr>\n
50<\/td>\nAnnex C (informative) Supplement for digital microphones
Table C.1 \u2013 Classification of the characteristics to be specified <\/td>\n<\/tr>\n
51<\/td>\nTable C.2 \u2013 Additional digital characteristics to be specified <\/td>\n<\/tr>\n
52<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Sound system equipment – Microphones<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2010<\/td>\n54<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":228564,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[643,2641],"product_tag":[],"class_list":{"0":"post-228560","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-33-160-50","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\/228560","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\/228564"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=228560"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=228560"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=228560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}