慢速美语 - 科技报道 New App Records Sound to Identify Dangerous Mosquitoes

慢速美语 - 科技报道 New App Records Sound to Identify Dangerous Mosquitoes

原文：

Scientists have created a new app designed to identify dangerous mosquitoes based on sounds the insects make.

The app, called Abuzz, is aimed at helping fight major diseases spread by mosquitoes. The diseases - such as malaria, dengue fever and yellow fever - kill hundreds of thousands of people each year.

Haripriya Vaidehi Narayanan is one of the researchers who helped develop the app. She began work on the project as a graduate student at Stanford University. She is now with the Department of Immunology at the University of California, Los Angeles.

Narayanan told VOA that anyone with a mobilephone could use the app to identify mosquitoes. "If they see a mosquito around, they just open the phone, open up the app, point their phone towards the mosquito and hit the recordbutton," she said.

"Then, when the mosquitoflapsits wings and starts flying around, it makes that noise, thatannoyingbuzzing noise. That noise is what gets recorded by the Abuzz app," she added.

FILE - In this Feb. 11, 2016 file photo of aedes aegypti mosquitoes are seen in a mosquito cage at a laboratory in Cucuta, Colombia.

Many diseases that mosquitoes carry do not have cures or vaccines. So, targeting the flying insects is the best way to control them. "The most important step is to know where the mosquitoes are," Narayanan said.

Traditional methods for hunting mosquitos are costly and can take a very long time. The process also requires labor-intensive trapping as well as trained scientists to identify the insects.

Manu Prakash is a professor of bioengineering at Stanford University and a lead investigator on the project. He says that out of about 3,500 different mosquitospecies, only about 40 are dangerous to humans.

Prakash says the goal of the project was to find out whether the mosquitoes around a person’s house are just an annoyance -- or whether they are possibly dangerous. To find out, his team decided to listen.

When mosquitoes move their wings up and down, they produce buzzing sounds. But each kind of mosquito makes a somewhat different buzzing noise. The app records these sounds.

Users of the app can get an answer by recording as little as one or two seconds of the buzzing sound. The app compares this recording to a collection of other recordings. It then predicts which species of mosquito it is most likely to be.

Billions of people around the world can use this tool with their phones. So, the researchers say they will be able tomonitormosquitoes on a much larger basis than in the past.

Bycrowdsourcingmosquito information worldwide, the app can help build maps of where dangerous mosquitoes are. This can help scientists and health officials identify areas where disease is likely to break out and where to target mosquito control.

Prakash said he believes this kind of widespread community effort can be an important step in fighting mosquito-causing diseases.

He added that the tool uses machine learning to get better as more people use it. "So, we're very excited that if … hundreds of thousands of people are recording mosquitoes every day - especially around the world - it will create the kind of community that is needed," Prakash said.

The development team isexpected to releasethe Abuzz app to the public in the coming months.

Another group of researchers at the University of Oxford in Britain has been developing a similar app, called Mozzwear. That app is designed to identify malaria mosquitoes by the sound they make.

I’m Bryan Lynn.

Words in This Story

app– n.a mobile phone program that performs a special function

button– n.a switch you press to control a piece of equipment

flap– adj.to move up and down quickly and repeatedly

mobile– adj.able to move or be moved easily

annoy– v.to make someone slightly angry

species–n.a group of animals or plants that are similar and can produce young animals or plants

monitor– v.watch something carefully

crowdsourcing– n.he act of giving pieces of work to a large group of people or to the public in order to gather information