DCN Wireless Installation and User Instructions System Design and Planning
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8.7Acoustic feedback
Acoustic feedback (‘howling’) occurs when the sound of the loudspeakers or headphones in the system is sent to the system again by activated microphones.
table 8.1: Acoustic feedback
Source | Quick solution | Structural solution |
The acoustic feedback is caused by | Decrease the volume level of the | Do as follows: |
the loudspeakers of the contribution | system. For example, with the knob | 1 Install a feedback suppressor |
devices. | on the front of the central control | between audio input 2 and audio |
| unit (refer to section 10.6.3). | output 2 of the central control |
|
| unit. |
|
| 2 Set the audio routing mode of |
|
| the system to Insertion (refer to |
|
| section 12.6). |
|
|
|
The acoustic feedback is caused by | Decrease the volume level of the | Install a feedback suppressor |
an external public address system | public address system or the DCN | between audio output 1 and the |
that is connected to the DCN | Wireless digital congress network. | input of the external public address |
Wireless digital congress network. |
| system. |
|
|
|
The acoustic feedback is caused by | Tell the chairmen and the delegates | Install and configure the |
the headphones that are connected | to decrease the volume level of their | headphones level reduction of the |
to the contribution devices. | headphones with their contribution | contribution devices. (Refer to the |
| devices. | section about the contribution |
|
| devices.) |
|
|
|
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