Disposable surgical masks best for making your speech ...
2 天前·New York, Dec 24 (IANS): Disposable surgical masks offer the best option in ensuring that you are being heard clearly when speaking, says a study that tested how different types of masks affect the acoustics of speech. For the study, published in The Journal of the Acoustical Society of America, the team tested medical masks, disposable surgical masks, masks with clear plastic windows around ...