Sökning: "Sound Pressure Level SPL"

Visar resultat 11 - 12 av 12 uppsatser innehållade orden Sound Pressure Level SPL.

1. 11. Active Noise Control in Forest Machines

   Master-uppsats, Institutionen för fysik

   Författare :Fredrik Forsgren; [2011]
   Nyckelord :Active Noise Control ANC ; Forest machine; Adaptive signal processing; Noise reduction; Adaptive filter; Feedforward; Feedback; Leaky; NLMS; FxLMS;

   Sammanfattning : Achieving a low noise level is of great interest to the forest machine industry. Traditionally this is obtained by using passive noise reduction, i.e. by using materials for sound isolation and sound absorption. LÄS MER

3. 12. Active Noise Control of a Forest Machine Cabin

   Uppsats för yrkesexamina på grundnivå, Institutionen för systemteknik

   Författare :Mårten Hedborg; Patrik Grylin; [2007]
   Nyckelord :Active Noise Contol; Aktiv Bullerdämpning;

   Sammanfattning : Today, a high noise level is considered a problem in many working environments. The main reason is that it contributes to stress and fatigue. Traditional methods using passive noise control is only practicable for high frequencies. As a complement to passive noise control, active noise control (ANC) can be used to reduce low frequency noise. LÄS MER