11
SPL Measuring Mode
The SPL mode is intended for measuring the sound pressure level of the low frequency sound
signals. The length of the analysed part of the signal equals to one second. The resultant value of
the sound pressure level is calculated from several spectral components for each analysed part of
the signal separately.
“157.9 dB”
is a section displaying the main result
“45Hz”
is a section displaying the frequency
“PH”
– the indicator that is responsible for enabling/disabling the Peak hold mode. Use
the
button 4
to enable/disable the Peak hold mode. The main result section holds the
maximum amplitude reached during the entire time of measurement, and in the frequency
area - the frequency at which the maximum amplitude value was reached. Collected data
is reset by pressing
button 4
twice.
“146.2dB”
- is a section displaying the current result (not being displayed if the Peak
Hold
(PH
) mode is not enabled)
“THD=2.3%”
is the harmonic distortion coefficient value of the signal