MSMA (monosodium methanearsonate) is an arsenic-based grass killer. It kills grassy weeds such as crabgrass and goosegrass without harming most turfgrasses. It contains organic arsenic that, according to the University of Tennessee Extension, is less harmful than aspirin.
There are several styles of hearing aids available, from the smallest - Invisible in the Canal (IIC) to the largest and strongest - Power Behind the Ear (BTE), and the very popular Receiver in the Canal (RIC) - made to fit most hearing losses while remaining nearly unseen.
Tuning in to Hearing-Aid Types. Digital hearing aids come in five major types and are categorized by where on or in the ear they're worn. In the fall of 2015 we asked more than 131,000 subscribers about their experiences with hearing loss and hearings aids. More than 20,000 aids were rated.