Airtorce sounds good when I use it in disaster recovery.

Evaluation : A Construction, Lifesytle I am participating in volunteers for the disaster recovery in Hiroshima (Typhoon). I can work safely since it makes the voice pass through. The sound of heavy machines is also reduced. But, the sand sometimes gets into my ear when I put Airtrorce on and off.

At first glance, heavy machines seem to have low pitched sound only.
But they make high pitch sound when engine and tire are rotating. And this high pitch sound make you irritated.

Airtorce ER®︎

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