6
3 Useful information about the device
3.5
Listening to noise
The main purpose of the
Stethophon 04
is for
listening
to noise.
The device is therefore almost always used with headphones.
The minimum sound level shown in the display should confirm
the results heard. These digital measurement values alone may
not provide enough information in certain situations.
Note:
Inexperienced users are advised to practise listen-
ing (see below) to allow them to use the device ef-
fectively after a short period of training.
Even though listening is more important than reading off the meas-
urement values, these operating instructions focus in particular
on the information shown in the display. This is simply because
the visible changes can be explained in greater detail than the
audible ones.
There is a volume setting for picking up the noise (see Section
3.4.1).
If the noise becomes so loud that it poses a health risk to the user,
the sound will be switched off automatically (see Section 3.4.2).
Practising listening
Practise listening, for example, on an exposed water pipe
with a tap. Learn to distinguish the sound of flows of different
strength.
z
First listen to what it sounds like when the water tap is closed
by placing the probe tip on the water pipe and measuring as
explained in Section 4.
z
Then listen to the noise when the water tap is open. Take your
measurement at the same spot as before.
z
Compare the two noises.
Another readily available practice object is a radiator with adjust-
able thermostat (difference between closed/open thermostat).
