The History Of Pest Repellents
Throughout history, people have used various methods to try to keep bugs away. Smoke from fires, for example, has been used to keep mosquitoes at bay since ancient times. In the middle ages, people hung plants and flowers around their homes, believing that the pleasant aromas would drive insects away.
Edison's repellent didn't work very well, but in the 1950s, a man named Dr. William S. Snyder developed a new and improved version. Snyder's repellent was much more effective at driving away insects, and ultrasonic bug repellents have been used ever since.
Ultrasonic repellents work by emitting a sound that is too high for humans to hear. Insects, however, can hear the sound, and it is incredibly annoying to them. The sound drives them away from the area where the repellent is located.
Today, ultrasonic bug repellents are marketed as a safe and effective way to keep insects away from your home. They are sold as stand-alone devices that you can plug into an outlet, or as part of a larger pest control system.