https://scholar.google.com/scholar?oi=gsb40&q=ultrasonic pest & insect repellent&lookup=0&hl=en
Κι όταν διαβάσεις ότι διαβάσεις, πες μας τι συμπέρασμα έβγαλες γιατί εγώ δεν έχω χρόνο να δω αν δείχνουν όντως αποτελεσματικότητα ή κριτικάρουν
(Κόλλα και ένα mosquito δίπλα αν θέλεις να δεις ειδικά για τα κουνούπια, βγάζει πράμα στα αποτελέσματα).
Δεν υπαρχει περιπτωση να τα διαβασω ολα αυτα
Το resume το γραφω παρακατω ... τωρα, μπορει καποιοι να θεωρουν πως τα παρακατω αρθρα/πληροφοριες χρηματοδοτούνται απο τη Bayer που πουλαει τα εντομοκτονα και θελει να ''κλεισει'' το Seitanidis Home Collection ή τη Diamantino που -μπορει- να πουλαει τους μαγικους υπερηχους μαζι με την εξυπνη σιτα και το Pretty colan...ο καθενας οτι θελει βαζει σπιτι του ....οπως εχω πει, δοκιμασα μια ευτυχως φθηνη συσκευη υπερηχων την οποια τοποθετησα διπλα σε κοπαδι κουνουπιων που ερωτοτροπουσαν με μια λαμπα ...δεν ειδα καμμια αλλαγη στη συμπεριφορα τους ...
http://www2.keelpno.gr/blog/?p=4269
Παρά το γεγονός ότι στο εμπόριο συναντά κανείς μεγάλο αριθμό τέτοιων συσκευών, δεν υπάρχει επαρκής επιστημονική τεκμηρίωση για την απωθητική δράση τους κατά των κουνουπιών και άλλων οργανισμών, σύμφωνα πάντα με μελέτες που έχουν διεξαχθεί από διάφορους επιστημονικούς φορείς παγκοσμίως.
http://www.tandfonline.com/doi/abs/10.1080/10934528409375178
Two commercially available ultrasonic devices (UD) were evaluated for their efficacy in repelling cockroaches and preventing the attack and biting of two species of mosquitoes. The frequency outputs were also determined.
The UD's were ineffective in eliminating or repelling the insects and one of the devices gave off sound radiation which could be potentially harmful.
http://www.mosquito.org/faq#ultrasonic
At least 10 studies in the past 15 years have unanimously denounced ultrasonic devices as having no repellency value whatsoever. Yet, consumers flock in droves to hardware stores to purchase these contraptions. Why? The discovery that mosquitoes locate mates in mating swarms via wing beat frequency generated a great deal of research into ultrasound as a potential source of environmentally-friendly control. Yet, all attempts to affect mosquito behavior by ultrasound have fizzled, despite enormous amounts of money spent upon research and development. To be sure, the clever, high-tech, and imperceptible (by humans) use of ultrasound proved to be an exceedingly effective marketing tool for the repeller manufacturers. Homeowners were urged to buy ultrasonic repellers and the like to rid their houses of pests without the need to inhale "even one breath of poisonous spray".
This appeal to the public's chemophobia, while extremely effective in diverting attention away from proven preventive and control measures (and toward their repeller products), has undermined an unbiased review of the subject by consumers desperate for a clean, effective, nonchemical means of mosquito control.
Unfortunately, no such miracle cure exists. A pioneering study testing five different ultrasonic devices against four mosquito species convincingly demonstrated that ultrasound in the 20-70 kHz range used by these devices had no effect on reorienting flight by female mosquitoes either toward or away from human subjects. Additional tests have shown that sound generators capable of a wide range of frequencies were also ineffective in repelling mosquitoes.
The fact is that these devices just do not work - marketing claims to the contrary.