User's Manual

59
APPENDIX B:
Specifications of speaker for free field tests
To produce the intensity levels in free field conditions specified in
Appendix A, the speaker utilized must meet the specifications indicated
below.
Speaker specifications:
Minimum input power
25 W
Nominal impedance
4-8 Ω
Sensitivity (at 1 m for 1 W, 1 kHz)
> 93 dB SPL
Pass band
105 Hz – 20 kHz