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.
1 Owns the Interton hearing aid brand. 2  Introduced the first commercially available hearing aid to use digital sound processing. 3  Created the first open-ear style hearing aid. 4  Introduced LiNX, the first-ever hearing aid made for iPhone, iPad and iPod, in 2013.