SN EN 60268-5 : 2003

1 Scope<br>2 Normative references<br>3 Conditions for measurement<br>&nbsp;&nbsp;&nbsp;3.1 General conditions<br>&nbsp;&nbsp;&nbsp;3.2 Measuring conditions<br>4 Test signals<br>&nbsp;&nbsp;&nbsp;4.1 General<br>&nbsp;&nbsp;&nbsp;4.2 Sinusoidal signal<br>&nbsp;&nbsp;&nbsp;4.3 Broadband noise signal<br>&nbsp;&nbsp;&nbsp;4.4 Narrow-band noise signal<br>&nbsp;&nbsp;&nbsp;4.5 Impulsive signal<br>5 Acoustical environment<br>&nbsp;&nbsp;&nbsp;5.1 General<br>&nbsp;&nbsp;&nbsp;5.2 Free-field conditions<br>&nbsp;&nbsp;&nbsp;5.3 Half-space free-field conditions<br>&nbsp;&nbsp;&nbsp;5.4 Diffuse sound field conditions<br>&nbsp;&nbsp;&nbsp;5.5 Simulated free-field conditions<br>&nbsp;&nbsp;&nbsp;5.6 Half-space simulated free-field conditions<br>6 Unwanted acoustical and electrical noise<br>7 Positioning of loudspeaker and measuring microphone<br>&nbsp;&nbsp;&nbsp;7.1 Measuring distance under free-field and half-space<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;free-field conditions<br>&nbsp;&nbsp;&nbsp;7.2 Positioning of loudspeaker in diffuse field conditions<br>&nbsp;&nbsp;&nbsp;7.3 Positioning of loudspeaker and microphone in simulated<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;free-field conditions<br>8 Measuring equipment<br>9 Accuracy of the acoustical measurement<br>10 Mounting of loudspeakers<br>&nbsp;&nbsp;&nbsp;10.1 Mounting and acoustic loading of drive units<br>&nbsp;&nbsp;&nbsp;10.2 Mounting and acoustic loading of a loudspeaker system<br>11 Standard baffle and measuring enclosures<br>&nbsp;&nbsp;&nbsp;11.1 Standard baffle<br>&nbsp;&nbsp;&nbsp;11.2 Standard measuring enclosures<br>12 Preconditioning<br>13 Type description<br>&nbsp;&nbsp;&nbsp;13.1 General<br>&nbsp;&nbsp;&nbsp;13.2 Loudspeaker drive units<br>&nbsp;&nbsp;&nbsp;13.3 Loudspeaker system<br>14 Marking of terminals and controls<br>15 Reference plane, reference point and reference axis<br>&nbsp;&nbsp;&nbsp;15.1 Reference plane - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;15.2 Reference point - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;15.3 Reference axis - characteristic to be specified<br>16 Impedance and derivative characteristics<br>&nbsp;&nbsp;&nbsp;16.1 Rated impedance - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;16.2 Impedance curve<br>&nbsp;&nbsp;&nbsp;16.3 Total Q-factor (Q[t])<br>&nbsp;&nbsp;&nbsp;16.4 Equivalent air volume of a loudspeaker drive unit<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;compliance (v[as])<br>17 Input voltage<br>&nbsp;&nbsp;&nbsp;17.1 Rated noise voltage<br>&nbsp;&nbsp;&nbsp;17.2 Short-term maximum input voltage<br>&nbsp;&nbsp;&nbsp;17.3 Long-term maximum input voltage<br>&nbsp;&nbsp;&nbsp;17.4 Rated sinusoidal voltage<br>18 Input electrical power<br>&nbsp;&nbsp;&nbsp;18.1 Rated noise power - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;18.2 Short-term maximum power - characteristic to<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;be specified<br>&nbsp;&nbsp;&nbsp;18.3 Long-term maximum power - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;18.4 Rated sinusoidal power - characteristic to be specified<br>19 Frequency characteristics<br>&nbsp;&nbsp;&nbsp;19.1 Rated frequency range - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;19.2 Resonance frequency<br>&nbsp;&nbsp;&nbsp;19.3 Tuning frequency of a bass reflex or passive radiator<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;loudspeaker system - characteristic to be specified<br>20 Sound pressure under free-field and half-space free-field<br>&nbsp;&nbsp;&nbsp;conditions<br>&nbsp;&nbsp;&nbsp;20.1 Sound pressure in a stated frequency band<br>&nbsp;&nbsp;&nbsp;20.2 Sound pressure level in a stated frequency<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;band - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;20.3 Characteristic sensitivity in a stated frequency band<br>&nbsp;&nbsp;&nbsp;20.4 Characteristic sensitivity level in a stated frequency<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;band - characteristic to be specified<br>&nbsp;&nbsp;&nbsp;20.5 Mean sound pressure in a stated frequency band<br>&nbsp;&nbsp;&nbsp;20.6 Mean sound pressure level in a stated frequency band -<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;characteristic to be specified<br>21 Response under free-field and half-space free-field conditions<br>&nbsp;&nbsp;&nbsp;21.1 Frequency response<br>&nbsp;&nbsp;&nbsp;21.2 Effective frequency range<br>&nbsp;&nbsp;&nbsp;21.3 Transfer function<br>22 Output power (acoustic power)<br>&nbsp;&nbsp;&nbsp;22.1 Acoustic power in a frequency band<br>&nbsp;&nbsp;&nbsp;22.2 Mean acoustic power in a frequency band<br>&nbsp;&nbsp;&nbsp;22.3 Efficiency in a frequency band<br>&nbsp;&nbsp;&nbsp;22.4 Mean efficiency in a frequency band<br>23 Directional characteristics<br>&nbsp;&nbsp;&nbsp;23.1 Directional response pattern<br>&nbsp;&nbsp;&nbsp;23.2 Radiation angle<br>&nbsp;&nbsp;&nbsp;23.3 Directivity index<br>&nbsp;&nbsp;&nbsp;23.4 Coverage angle or angles<br>24 Amplitude non-linearity<br>&nbsp;&nbsp;&nbsp;24.1 Total harmonic distortion<br>&nbsp;&nbsp;&nbsp;24.2 Harmonic distortion of the nth order (where n=2 or n=3)<br>&nbsp;&nbsp;&nbsp;24.3 Characteristic harmonic distortion<br>&nbsp;&nbsp;&nbsp;24.4 Modulation distortion of the nth order<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(where n=2 or n=3)<br>&nbsp;&nbsp;&nbsp;24.5 Characteristic modulation distortion of nth order<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(where n=2 or n=3)<br>&nbsp;&nbsp;&nbsp;24.6 Difference frequency distortion (of the second<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;order only)<br>25 Rated ambient conditions<br>&nbsp;&nbsp;&nbsp;25.1 Temperature ranges<br>&nbsp;&nbsp;&nbsp;25.2 Humidity ranges<br>26 Stray magnetic fields<br>&nbsp;&nbsp;&nbsp;26.1 Static components<br>&nbsp;&nbsp;&nbsp;26.2 Dynamic components<br>27 Physical characteristics<br>&nbsp;&nbsp;&nbsp;27.1 Dimensions<br>&nbsp;&nbsp;&nbsp;27.2 Mass<br>&nbsp;&nbsp;&nbsp;27.3 Cable assemblies<br>28 Design data<br>29 Indication of the characteristics to be specified<br>Annex A (informative) Standard measuring enclosure type A<br>Annex B (informative) Standard measuring enclosure type B<br>Annex C (informative) Definitions of terms used in Clause 13<br>Annex ZA (normative) Normative references to international<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;publications with their corresponding<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;European publications<br>Bibliography

Gives the characteristics to be specified and the relevant methods of measurement for loudspeakers using sinusoidal or specified noise or impulsive signals. Applies to sound system loudspeakers, treated entirely as passive elements.