Earplug Actuator Selection for a Miniature Personal Active Hearing Protection System

• Autorzy: Pawełczyk M. , Latos M.
• Języki publikacji: EN

Abstrakty

EN

There are many industrial environments which are exposed to a high-level noise. It is necessary to protect people from the noise. Most of the time, the consumer requires a miniature version of a noise canceller to satisfy the internal working place requirements. Very important thing is to select the most appropriate personal hearing protection device, for example an earplug. It should guarantee high passive noise attenuation and allow for secondary sound generation in case of active control. In many cases the noise is nonstationary. For instance, some of the noisy devices are switched on and off, speed of some rotors or fans changes, etc. To avoid any severe transient acoustic effects due to potential convergence problems of adaptive systems, a fixed-parameter approach to control is appreciated. If the noise were stationary, it would be possible to design an optimal control filter minimising variance of the signal being the effect of the acoustic noise and the secondary sound interference. Because of noise nonstationarity for most applications, the idea of generalised disturbance defined by a frequency window of different types has been developed by the authors and announced in previous publications. The aim of this paper is to apply such an approach to different earplugs and verify its noise reduction properties. Simulation experiments are conducted based on real world measurements performed using the G.R.A.S. artificial head equipped with an artificial mechanical ear, and the noise recorded in a power plant.

Słowa kluczowe

EN

active noise control; fixed-parameter control; high-level noise; nonstationary noise; feedforward control; earplug; hearing protection

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2010
• Tom: Vol. 35, No. 2
• Strony: 213--222
• Opis fizyczny: Bibliogr. 18 poz., fot., tab., wykr.

Twórcy

autor

Pawełczyk M.

autor

Latos M.

• Silesian University of Technology Institute of Automatic Control Akademicka 16, 44-100 Gliwice, Poland,

Bibliografia

• 1. Bockstael A., De Greve B. (2008), Verifying the attenuation of earplugs in situ: Method validation using artificial head and numerical simulations, Journal of the Acoustical Society of America, 124, 2, 973-981.
• 2. Elliott S.J. (2001), Signal Processing for Active Control, Academic Press, London.
• 3. Elliott S.J. (2009), Active Control in Vehicles and in the Inner Ear: a Review, International Journal of Acoustics and Vibration, 14, 4, 212-219.
• 4. Engel Z. (1984), Active Reduction of Vibration and Noise [in Polish: Aktywna redukcja drgań i hałasu], Proceedings of the 11th Conference on Vibration in Physical Systems, Poznań, Poland.
• 5. Engel Z., Kowal J. (1995), Control of Vibroacoustic Processes [in Polish: Sterowanie Procesami Wibroakustycznymi], University of Mining and Metalurgy Press, Kraków.
• 6. Engel Z., Makarewicz G. (2001), Active Noise and Vibration Reduction Methods [in Polish: Metody Aktywne Redukcji Hałasu], CIOP Press, Warszawa.
• 7. Larsson M., Johansson S., Claesson I., Hakansson L. (2009), A Module Based Active Noise Control System for Ventilation Systems, Part I: Influence of Measurement Noise on the Performance and Convergence of the Filtered-x LMS Algorithm, International Journal of Acoustics and Vibration, 14, 4, 188-195.
• 8. Latos M., Pawełczyk M. (2009a), Feedforward fixed-parameter control of non-stationary noise, Proceedings of the 56th Open Seminar on Acoustics - OSA56, Goniadz, Poland.
• 9. Latos M., Pawełczyk M. (2009b), Feed forward vs Feedback Fixed-Parameter H2 Control of Non-Stationary Noise, Archives of Acoustics, 34, 4, 407-421.
• 10. Latos M., Pawełczyk M. (2009c), Fixed-parameter control of non-stationary acoustic noise, Proceedings of the 16th International Congress on Sound and Vibration - ICSV16, Kraków, Poland.
• 11. Nelson P., Elliott S. (1992), Active Control of Sound, Academic Press Ltd.
• 12. Pawełczyk M. (1999), Active Noise Control for Compact Acoustic Plants, J. Skalmierski Computer Studio, Gliwice.
• 13. Pawełczyk M. (2005), Feedback Control of Acoustic Noise at Desired Locations, Silesian University of Technology, Gliwice.
• 14. Pawełczyk M. (2009), Analog Active Control of Acoustic Noise at a Virtual Location, IEEE Transactions on Control Systems Technology, 17, 2, 465-472.
• 15. Saxena G., Ganesan S., Das M. (2008), Real-time Implementation of Adaptive Noise Cancellation, IEEE International Conference on Electro/Information Technology, 431-436.
• 16. Vidyasagar S. (1985), Control Systems Synthesis. A Factorization Approach, MIT Press, Cambridge.
• 17. Widrow B., Stearns S.D. (1985), Adaptive Signal Processing, Prentice Hall, New Jersey.
• 18. Williams W. (2008), Hearing protector testing and individual variability, Acoustics Australia, 36, 2, 60-62.