Where Current Standards and Codes Fall Short: Tones and Unsteady Noise from MEP Systems

Industry standards and building codes that address noise from mechanical, electrical and plumbing (MEP) systems typically limit noise levels but do not adequately address tones or unsteady conditions such as fluctuating or impulsive noise. Such conditions may be difficult to quantify but are a recurring theme when it comes to noise complaints in occupied buildings. This presentation uses recent project examples where discrete tones or unsteady noise from MEP systems resulted in complaints but still complied with current standards and building codes and provides a basic guide to help the practicing engineer recognize and avoid these problems.