Shortly after the pandemic began, we began collecting various types of face coverings (transparent and nontransparent) to study the sound quality using a broad noise presented through a styrofoam mannequin head with a speaker mounted in its mouth.
Hearing Health Blog
Shortly after the pandemic began, we began collecting various types of face coverings (transparent and nontransparent) to study the sound quality using a broad noise presented through a styrofoam mannequin head with a speaker mounted in its mouth.