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.
While open-fit hearing aids are the most popular choice of hearing aids and certainly offer many benefits, they are not for everyone. The best practice before selecting a hearing aid is to have a hearing test done by a qualified hearing healthcare provider. The best style of hearing aid for an individual depends on hearing test results, dexterity, vision, communication needs, lifestyle and what they can afford.
Just 20 years ago, most hearing aids were analog; they were not programmable and certainly not digital. Hearing aids had no software, they were adjusted using a screwdriver, and generally, there were only two adjustment screws. Most hearing aids didnt have telecoils, and very few had directional microphones.