IBM 560E manual Acoustical Readings, WAd Bels, Idle

Electrical		Specifications
Input	Voltage			(35	W)
			ñ	100–240
(V	ac)
Frequency		(Hz)		50/60
Input	ò	(kVA)		0.132
ñ	Range		is automatically	selected;	sine wave input is required.

òAt maximum configuration.

Figure 1-6. Electrical Specifications for the ThinkPad 560/560E

Acoustical Readings

L WAd in

bels

Operate

LpAm

in

dB

<L

pA >m

in

dB

Operate

Idle

Idle

Operate

Idle

4.0

3.4

34

30

27

22

Notes:

L WAd

Is

the

declared

sound

power

level

for the random

sample

of

machines.

L pAm

Is

the

mean

value

of

the

A-weighted

sound

pressure

levels

at

the

operator

position

(if

any)

for

the

random

sample of

machines.

<L pA >m

Is

the

mean

value

of

the

A-weighted

sound

pressure

levels

at

the

one-meter position for the random sample of machines.

Operate

Shows

the

value while

using

the

hard

disk

drive.

All measurements made in accordance with ANSI S12.10 and reported in conformance with ISO 9296.

Figure 1-7. Acoustical Readings for the ThinkPad 560/560E

1-10ThinkPad 560/560E System Overview