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.
Health professionals use a variety of names to describe assistive devices: 1  Assistive listening devices (ALDs) help amplify the sounds you want to hear, especially where thereâs a lot of background noise. ALDs can be used with a hearing aid or cochlear implant to help a wearer hear certain sounds better.