In general, buzzing. We won't know how many filters are adequate until we try. At the very least, seventy hours are required. It was taken for the purpose of soldering any garbage from a computer and then erasing cotton swabs with a solvent from the soldered garbage in order to remove flux residues. Maintaining one's health is essential. I don't know what you call it, but it's probably a "storage bag." It's probably made of polyethylene and has a ziplock on it. My mental image of a bag used for storing is somewhat different.