LG has announced a very strange smartphone for the Indian market: the LG K7i. A device with a special shell that emits ultrasound supposed to repel mosquitoes. The problem is that this technique does not seem to work.
In metropolitan France, mosquitoes do not represent a real threat to public health. This is not the case in many countries with a tropical or equatorial climate, in which populations have to live with the risk of epidemics of chikungunya or malaria. LG somehow surpasses the fears of these populations in marketing a strange LG K7i.
It is an entry-level smartphone terribly commonplace, poor technical data with a screen of 480 x 854 pixels, a quad-core MediaTek processor clocked at 1.1 GHz and 2 GB of RAM. Its main characteristic is that it is sold with a hull equipped with a loudspeaker that produces a sound with a frequency greater than 30 000 Hz. According to the information produced by LG on its official site, the sounds of a frequency greater than 30 kHz would cause mosquitoes to escape without harming the human ear. The small diagrams thus indicate that this shell would leak more than 70% of the mosquitoes located near the device.
Ultrasound more effective on dogs than on mosquitoes
The problem, and as our colleagues in Numerics point out, is that this method has not really been approved by scientific studies. The BBC said in an article published in 2012 that a dozen scientific studies on the subject had concluded that ultrasound had no effect on mosquito bites.
In addition, if humans do not hear these ultrasounds, it is not the case for pets. Not only is it not certain that mosquitoes actually move away from the smartphone when its ultrasound hull is activated, unlike your pets, which are likely to hate you.
But if you are one of those unfortunates who have a dog barking permanently in the vicinity, you can still import the phone from India. It only costs 7990 Indian rupees, a little over 100 euros.