Details
| Original language | English |
|---|---|
| Pages | 444-452 |
| Number of pages | 9 |
| Publication status | Published - 2016 |
| Event | 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 - Hamburg, Germany Duration: 21 Aug 2016 → 24 Aug 2016 |
Conference
| Conference | 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 |
|---|---|
| Country/Territory | Germany |
| City | Hamburg |
| Period | 21 Aug 2016 → 24 Aug 2016 |
Abstract
Headphones with an integrated active noise cancellation system have been increasingly introduced to the consumer market in recent years. When exposing the human ear to active noise sources in this striking distance, the ensuring of a safe sound pressure level is vital. In feedback systems, this is coupled with the stability of the closed control loop; stable controller design is thus essential. However, changes in the control path during run-time can cause the stable control system to become unstable, resulting in an overdrive of the speakers in the headphones. This paper proposes a method, which enables the real-time analysis of the current system state and if necessary stabilizes the closed loop while maintaining the active noise reduction. This is achieved by estimating and evaluating the open loop behavior with an adaptive filter and subsequently limiting the controller gain in respect to the stability margin.
Keywords
- Active noise cancellation, Feedback control, Stability analysis
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
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2016. 444-452 Paper presented at 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016, Hamburg, Germany.
Research output: Contribution to conference › Paper › Research › peer review
}
TY - CONF
T1 - Automatic Stabilization of an Adaptive Feedback Control for Noise Cancelling In-Ear Headphones
AU - Höber, Sven
AU - Pape, Christian
AU - Reithmeier, Eduard
PY - 2016
Y1 - 2016
N2 - Headphones with an integrated active noise cancellation system have been increasingly introduced to the consumer market in recent years. When exposing the human ear to active noise sources in this striking distance, the ensuring of a safe sound pressure level is vital. In feedback systems, this is coupled with the stability of the closed control loop; stable controller design is thus essential. However, changes in the control path during run-time can cause the stable control system to become unstable, resulting in an overdrive of the speakers in the headphones. This paper proposes a method, which enables the real-time analysis of the current system state and if necessary stabilizes the closed loop while maintaining the active noise reduction. This is achieved by estimating and evaluating the open loop behavior with an adaptive filter and subsequently limiting the controller gain in respect to the stability margin.
AB - Headphones with an integrated active noise cancellation system have been increasingly introduced to the consumer market in recent years. When exposing the human ear to active noise sources in this striking distance, the ensuring of a safe sound pressure level is vital. In feedback systems, this is coupled with the stability of the closed control loop; stable controller design is thus essential. However, changes in the control path during run-time can cause the stable control system to become unstable, resulting in an overdrive of the speakers in the headphones. This paper proposes a method, which enables the real-time analysis of the current system state and if necessary stabilizes the closed loop while maintaining the active noise reduction. This is achieved by estimating and evaluating the open loop behavior with an adaptive filter and subsequently limiting the controller gain in respect to the stability margin.
KW - Active noise cancellation
KW - Feedback control
KW - Stability analysis
UR - http://www.scopus.com/inward/record.url?scp=84994558898&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:84994558898
SP - 444
EP - 452
T2 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016
Y2 - 21 August 2016 through 24 August 2016
ER -