User manual

GB
SoundTest-Master
09
Setting date/time (setup)
3
The current data and time should be set before using the
device for the first time to ensure stored measured values
are assigned for subsequent evaluation. Press and hold
the "MAX" button while switching on. You can change
the value with the "LEVEL" buttons and move to the next
value with the "MAX" button.
Date format: Year/month/day. Switch off the device to
store the setting.
Sound pressure level (dB)
4
This device registers sound in a similar way to the human ear. The
integrated microphone receives the incoming sound waves and
converts them into electrical signals. Human hearing involves speciÖ c
auditory curves. The greater the sound pressure, the louder the
sound is perceived to be. The higher the frequency, the higher the
pitch of the sound is perceived to be. To ensure that measurements
are aurally compensated, this measuring device is Ö tted with Ö lters.
The A-weighting (dB A) replicates the frequency response associated
with human hearing and is used for the majority of industrial noise
and environmental noise measurements.
Powerful wind noises (> 10m/s) can affect the measured value. In such cases, you should use the
wind de× ector supplied with the product.
!
After switching on the device, correspondingly switch over the dB A/
dB C weighting Ö lter by pressing the "A/C" button.
The C-weighting is used in industrial measurements.
Sound source Sound pressure level in dB (A)
Auditory threshold
0
Quiet residential area
30 to 40
Low-level conversation, quiet ofÖ ce
40 to 50
Normal conversation
50 to 60
Heavy road trafÖ c
70 to 80
Shouting, screaming
80 to 85
Pneumatic hammer (10 m away)
90 to 100
Start-up of a jet aircraft (100 m away)
120 to 130
Pain threshold
140