IEC 62459:2010

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
5 Clamping of the suspension part
6 Methods of measurement
7 Static displacement x[static](F[dc])
8 Static stiffness K[static](x[static])
9 Lowest cone resonance frequency, f[0]
10 Dynamic stiffness K(x[ac])
11 Coefficients of the power series expansion of K(x)
12 Effective stiffness K[eff](x[peak])
13 Mechanical resistance R
Bibliography

IEC 62459:2010 applies to the suspension parts of electroacoustic transducers (for example, loudspeakers). It defines the parameters and measurement method to determine the properties of suspension parts like spiders, surrounds, diaphragms or cones before being assembled in the transducer. The measurement results are needed for engineering design purposes and for quality control. Furthermore, this method is intended to improve the correlation of measurements between suspension-part manufacturers and loudspeaker manufacturers. The measurement methods provide parameters based on linear and nonlinear modelling of the suspension part and uses both static and dynamic techniques. It cancels and replaces IEC/PAS 62459 published in 2006. It constitutes a technical revision. The main changes are:
- descriptions of the methods of measurement are adjusted to the state of the technology;
- addition of Clauses 5 to 13;
- integration of Annex A in the main body of the standard;
- overall textual review.
The contents of the corrigendum of November 2015 have been included in this copy.