Improvements in Acoustic Feedback Margin in Sound Reinforcement Systems
Acoustic feedback stability is a fundamental limitation of all public address, sound reinforcement, and duplex teleconferencing systems. Over the past 30 years, a number of techniques have been developed to help improve the gain before feedback margin. This paper reviews progress to date and demonstrates that a new class of loudspeaker, the distributed mode loudspeaker, inherently possesses a number of characteristics that potentially make it less prone to feedback. Initial experiments are reported that show a 4-dB improvement in feedback margin without electronic assistance, which are gains comparable with most other current signal processing techniques.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.