5.5.2 Audio


All the 2N LTE intercom models are equipped with a speaker or power amplifier output to which an external loudspeaker can be connected. Set the phone call and state signalling volume control in this configuration section. Set the Master volume to control the master volume of the device: volume of calls, signalling tones, etc. Set this parameter according to the ambient noise level. If the noise level is not constant, use the Adaptive mode to increase the master volume temporarily depending on the ambient noise level.


Model

Master Volume

2N LTE Verso

-8 dB .. +8 dB (2W)

List of Parameters



  • Master volume – set the master volume based on the desired call volume, then adjust other sound volumes as needed. This setting affects the volume of all sounds.



  • Adaptive volume – enable Adaptive Volume mode, which gradually increases the device volume based on the difference between the measured Current Noise Level and selected Sensitivity Threshold, up to the set Maximum Gain value. This setting further increases Master Volume.
  • Maximum gain – set the Maximum Gain that can be applied on top of the Master Volume once the Current Noise Level surpasses the Sensitivity Threshold.
  • Sensitivity threshold – set the ambient noise threshold that determines when the volume starts increasing.
  • Current noise level – display the current ambient noise level.
  • Current adaptive gain – display the current adaptive gain of the master volume. The value is determined by the difference of the Current noise level and Sensitivity threshold and never exceeds the Maximum gain value.



  • Ringtone volume –  set the volume of the incoming call ringtone. The value is relative to the master volume.
  • Call-progress tone volume – set the volume for dial, ringing, and busy tones. This setting will not be applied if ringback tones are generated externally. The value is relative to the master volume.



  • Button Press Volume – set the Button Press Volume. The volume values are relative against the set master volume.
  • Warning tone volume – set the volume of warning and signaling tones described in the Signaling of Operational Statuses section. The value is relative to the master volume.
  • Switch activation tone volume – set the volume of switch activation tone. The value is relative to the master volume.
  • User sounds volume – set the volume of user sounds played by automation. The value is relative to the master volume.



  • Acoustic feedback filter – set automatic suppression of acoustic feedback (typically whistling) between the intercom speaker and phone handset if located in close proximity to the intercom. This mode is disabled by default. 



  • Noise Detection Enabled – switch on automatic detection of noise or microphone noise level threshold exceeding. Process the threshold exceeding alarm using Event.NoiseDetected and assign it to other user actions. 



  • Noise Level Threshold – set the microphone noise level threshold for alarm setting.
  • Alarm Start Delay – set the time interval during which the signal must be above the threshold to start alarm. 
  • Alarm End Delay – set the time interval during which the signal must be below the threshold to stop alarm.
  • Noise Level Graph – display the signal level history. Red designates alarm activation.