Response Time - Velleman AVM2050 Mode D'emploi

selector
60 dB
70 dB
80 dB
90 dB
Example: when the RANGE selector is set to 80 dB and the pointer
points to -3, the sound level is 77 dB.
7. Output
 You can connect the AVM2050 to recording or other equipment through
the OUTPUT connector. For example: use an audio cable to connect the
device to an AUX or LINE input of a recorder.
 Always bear in mind that the output signal is influenced by the internal
filtering process.
 Set the RANGE selector to a value for which the maximum deviation of
the meter is never more than +4 to prevent the internal amplifier from
removing the signal. Use the A weighting for recordings with voices and
the C weighting for entirely instrumental recordings. Connect the output
with high impedance headphones, an oscilloscope, a frequency analyser
or any other measuring instrument.

8. Response Time

 The response switch has 2 positions: FAST and SLOW.
FAST makes the meter react fast to sudden changes is the sound
o
level. This position is ideal for peak measurement.
SLOW is used for average noise level measurements. Short sound
o
surges have little effect.
9. Weighting
 The WEIGHTING switch is used to measure the sound level for a specific
frequency range.
A-weighting means the meter will be measuring predominantly in
o
the 500-10.000 Hz frequency range. This range corresponds to the
frequencies most audible to the human ear.
C-weighting concentrates on fixed sound levels between 32 and
o
10000 Hz; these are sound sources with a constant frequency and
sound level.
10. Microphone
 The measurements are most accurate when the meter is directed
directly towards the sound source.
V. 02 – 18/04/2016
AVM2050
range
50-66 dB
60-76 dB
70-86 dB
80-96 dB
selector
100 dB
110 dB
120 dB
4
range
90-106 dB
100-116 dB
110-126 dB
©Velleman nv