1、IEC 62459:2010/COR1:2015 1 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ IEC 62459 Edition 1.0 2010-01 Sound system equipment Electroacoustical transducers Measurement of suspension parts CORRIGENDUM 1 3.11 lowest cone resonance frequency Replace the existing Formula (7) by the following new
2、Formula: s off 0 ) 2 1 m x f ( (7)6.3 Incremental dynamic measurement Replace the existing first sentence by the following: This technique for measuring the incremental stiffness K inc (x dc ) according to Equation (3) uses a superposition of a d.c. signal of certain magnitude (for example, constant
3、 restoring force F dcgenerating a d.c. position x dc ) and a small a.c. signal (e.g. restoring force F ac ) as stimulus and measures the a.c. response of the suspension part (e.g. the a.c. part of the displacement x ac ) under steady-state condition. 6.4 Full dynamic measurement Replace the existing
4、 paragraph by the following: This technique for measuring the dynamic stiffness K(x ac ) uses an a.c. signal of certain magnitude (for example, the a.c. restoring force F ac ) and measures the a.c. response of the suspension part (for example, a displacement x ac ). 9.1 Characteristic to be specified Replace, in the second sentence of this paragraph, “Equation (6)“ by “Equation (1)“. IEC 62459:2010-01/COR1:2015-11(en)
