What Volume, How Long - Lehmannaudio Black Cube Linear Pro Bedienungsanleitung

What volume - how long?
Hearing pressure
Today most headphones allow hearing lev-
els well above a secure level for the listener.
This means that a standard pair of cans might
survive extremely high levels without any
degradation of long term performance but the
hearing of the listener might be seriously dam-
aged. Especially interesting are the standards of
different regions. Taking a look at laws in the US
and in Europe reveals substantial differences in
what is thought to be suitable sound pressure
levels for the listener:
Sound pressure h
OurS per
dBa
day
90 8
92 6
95 4
97 3
100 2
102 1,5
105 1
110
115
Figure taken from the US department
of labour noise regulations
Sound presure h m
OurS per inuteS per
dBa d
ay
85 8
88 4
91 2
94 1
97
100
103
106
109
112
115
118
121
Roughly harmonized throughout Europe
Please take this recommendations seriously.
It is proven that exceeding these times in-
duces a hearing damage!
m
inuteS per
d
ay
30
15
S
ecOndS per
d d
ay ay
30
15
7,5
225
112
56
28
14
7

Black Cube Linear Pro
Lehmannaudio