IEC 62459:2010/COR1:2015

 IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 62459
Edition 1.0  2010-01
Sound system equipment –
Electroacoustical transducers –
Measurement of suspension parts

CO RRI G E NDUM 1
3.11
lowest cone resonance frequency
Replace the existing Formula (7) by the following new Formula:

Κ(x )
off
(7)
f ≈
2π δm
s
6.3 Incremental dynamic measurement

Replace the existing first sentence by the following:
This technique for measuring the incremental stiffness K (x ) according to Equation (3)
inc dc
uses a superposition of a d.c. signal of certain magnitude (for example, constant restoring
generating a d.c. position x ) and a small a.c. signal (e.g. restoring force F ) as
force F
dc dc ac
stimulus and measures the a.c. response of the suspension part (e.g. the a.c. part of the
displacement x ) under steady-state condition.
ac
6.4 Full dynamic measurement
Replace the existing paragraph by the following:
This technique for measuring the dynamic stiffness K(x ) uses an a.c. signal of certain
ac
magnitude (for example, the a.c. restoring force F ) and measures the a.c. response of the
ac
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)

– 2 – IEC 62459:2010/COR1:2015
 IEC 2015
COMMISSION ÉLECTROTECHNIQUE INTERNATI
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