- 期刊
消音設備再生噪音與聲功率量測分析之研究
Research of Silencer Regenerated Noise and Analysis of Sound Power Level
摘要
空調通風系統廣泛的運用在工廠、住家及各大公眾場所，當風機在輸送氣體時都會產生噪音且透過管路系統傳遞，藉由空調消音設備（如：消音箱）可以降低這些噪音問題。音響實驗室的設計與功能可以實測消音箱的各項音響參數，涵蓋插入損失（Insertion Loss）、動態插入損失（Dynamic Insertion Loss）、流速（Velocity）、壓損（Pressure Drop）和再生噪音（Self-Generated Noise），為了瞭解再生噪音造成的影響，量測聲功率位準（Sound Power Level）是必要的。本文中針對聲功率位準進行一連串的量測計算分析之研究，透過在特殊環境以及一般環境下之測試來驗證實驗室對於聲功率位準的量測是可行的，因此進一步的研究氣流對消音箱產生的再生噪音對降低消音箱消音效果之影響。
並列摘要
In this paper we study the silencer acoustical properties which are common used in the pipeline system.It is used to reduce the flow noise and built into the air conditioner and ventilation systems are widely used in factories, homes and major public spaces. We measured the acoustic parameters of silencers in the Dynamic Insertion Loss acoustic laboratory, including the Insertion Loss, Dynamic Insertion Loss, Velocity, Pressure Drop and Self-Generated noise. We further explored to understand the influence of Self-Generated noise for sound power level measurement method. We carried out a series of computational analysis in special and general environments measurement to verify the measurement of Sound Power Level in the laboratory is feasible. We also study the effect for the noise reduction of silencer when the self noise generated by the silencer system due to airflow passing to the duct.