Frequency generator

Frequency generator (Anti-mosquito, anti-rat, dog whistle)

* Frequency generator

- 1Hz ~ 22000H

- On your smartphone, use the cursor or keyboard to adjust the frequency, then click "Play" to play the tone.

- The human ear recognizes a frequency between 20 Hz and 20000 Hz, but this perception can be exacerbated especially at frequencies near ultrasound

- Test the speakers and other audio devices.

- The generated signal is a sine wave.

* Mosquito repellent

1. The mosquito repellent app is divided into two types: a method using a high frequency of 20,000 Hz or more and a method using a frequency of 250 to 1000 Hz (a flight sound wave of a male mosquito).

Both methods use the frequency that the mosquito avoids, and the method using the high frequency is a principle that threatens the mosquito through the high frequency of the 20,000 Hz band of the mosquito nets 'bat' or 'dragonfly'. Using the frequency of 250 ~ 1000Hz, female mosquitoes are eaten through flight sound waves of male mosquitoes, which female mosquitoes have a habit of sucking blood.

2. Entomological studies have shown that female mosquitoes can be chased by artificially made male mosquito sounds. Spawning female mosquitoes that suck animal blood to make eggs are instinctively avoiding sounds that correspond to the frequencies that males emit through their wings. This is because it is not necessary to obtain sperm by mating with a male mosquito.

Here are some clues. The frequency of mosquito sounds varies between male and female, mosquito species, and age. You must make a sound that matches the type and condition of the mosquito to be kicked out. The mosquito noise frequency is known to be between 250 and 1000 Hz. In addition, male mosquito sound is 150-200Hz higher than female. If you want to chase a female mosquito that flies at a frequency of 450Hz, you can make a sound that corresponds to a frequency of 600Hz ~ 650Hz.

* Rat eradication

1. 20kHz ~

* Dog whistle

1.5kHz, 10kHz, 13kHz, 15kHz, 17kHz

* Language: English, Korean