Lexmark 4I3 - Manual (Page 293)

Appendix D. Declaration of IBM Product
Noise Emission Values
The following tables show the noise emission values for the 4230
Printer.
Notes:
1. LWAd is the declared sound power emission level for a
production series of machines.
2. m is the mean value of the space-averaged sound
pressure emission levels at the one-meter positions for a
production series of machines.
All measurements are made in accordance with the American
National Standards Institute (ANSI) S12.10 and reported in
conformance with the International Organization for Standardization
(ISO) 9296.
Table D-1. 4230 All Models
Impulsive Noise Prominent Discrete Tones
No No
Table D-2. Sound Emission Levels - 4230 Standard Covers
Sound Emission Category Operating Idling
LWAd 7 bels 4.5 bels
m 53 dB 30 dB
Table D-3. Sound Emission Levels - 4230 ASF Covers
Sound Emission Category Operating Idling
LWAd 7 bels 4.5 bels
m 55 dB 30 dB
Copyright IBM Corp. 1991, 1994 D-1