Sound Shower AA-160e / AA-160mm Operation Manual v.2.0 26.3.2012 ©
Panphonics Oy 3/7
Automatic Volume Control -Feature
Panphonics Automatic Volume Control feature adjusts the volume according to the
ambient noise level. The built in calibration routine automatically detects the effects
of the surrounds and takes these into account when making the adjustments.
Ambient Control algorithm monitors the background noise level and starts to increase
the volume after the noise exceeds the set base level. This enables an efficient
adjustment of the volume level keeping the audio at a clearly audible yet
comfortable level.
The remote calibration procedure is started using ‘amb calibrate’ –command. Please
make sure that the installation is made correctly. For detailed instructions see the
‘Installation’ –section. Please note also that the calibration noise is played at
relatively high volume and can be extremely painful right under the loudspeaker.
The base level (the ambient noisel level parameter when the Automatic Volume
Control –feature activates) is automatically set during the standard calibration
procedure. In some circumstances the automatic base level setting will not give the
optimal results. It is sometimes more convenience to setup the parameter manually
e.g. when there is no background noise at all at the nighttime or there is an
excessive non-stop noise during the installation.
The base level setting can be changed manually by ‘using amb baselevel xx’ –
command. The numerical base level value is given in decibels (dB) range. The correct
base level setting can be found out by using e.g. sound pressure level meter during
the time of average background noise level.
amb#calibrate#
Run&calibration&routine&for&ambient&control&
Usage:&amb&calibrate&
Output:&NA&
&
amb#baselevel#xx#
Set#ambient#noise#level#where#gain=0dB.#Default.#This#parameter#is#automatically#determined#
during#the#calibration#process#but#can#be#set#also#manually.#
Usage:#amb#baselevel#40#
Output:#OK:#Value#set#
After the calibration procedure the feature can be switched on or off by using the
‘amb on’ and ‘amb off’ -commands.
&
amb#on#
Set&Ambient&Control&active&
Usage:&amb&on&
Output:&OK&
&
amb#off#
Set&Ambient&Control&inactive&
Usage:&amb&off&
Output:&OK&
&
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