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Insertion loss in a sound attenuator refers to the reduction in sound power level that occurs when a sound wave passes through the attenuator. It is typically measured in decibels (dB) and quantifies how much sound energy is lost due to the attenuator's materials and design. High insertion loss indicates effective sound attenuation, while low insertion loss suggests that the attenuator may not be as effective in reducing sound levels. This parameter is crucial for designing systems that require noise control, such as HVAC systems or industrial applications.

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