ok guys, unless you just love flies [mosquitoes ?] buzzing and sharing your meal, be it at a roadhouse, braai , restaurant, picnic or whatever… maybe peanuts at the bar counter?
download a free frequency generator app on your mobile and activate it at full volume at a high frequency whilst socializing/working [at the scenic river front or at skukuza] and the odds are you will protect yourself against flies and even mozzies.
nobody can hear, except it bothers the hell out of bugs.
my favorite frequency is 18752Hz - your goggas might respond to something different 