Better Chamber Type Spark Arresting:
Expected Attenuation is 21 to 24 dBA
Use a model MSA2 in residential areas where background noise is present but not objectionable and a spark arresting feature is desired. In these areas, installation of an MSA2 on an engine
exhaust is intended to bring the noise level down
to match the ambient noise levels.
Example: In quieter residential areas away from main traffic and constant noise sources.