![](\"https:\/\/media.wired.com\/photos\/5a386a3fea8d87431e1a8880\/master\/strikingimageTA.jpg\")
<\/a>Illustration of an acoustic\u00a0pattern of mouth clicks for human echolocation. Image Credit: Thaler et al.<\/p><\/div><\/p>\n
<\/p>\n
Kish is the president of\u00a0World Access for the Blind<\/a>, which focuses on helping blind individuals achieve greater independence. He teaches others the technique of echolocation. He\u2019s also actively helping researchers better understand echolocation.<\/p>\n A study, published in\u00a0PLOS Computational Biology<\/a>, examined the acoustic characteristics of the mouth clicks made by Kish and two other blind individuals with remarkable echolocation skills. The researchers from Durham University, U.K., and Birmingham University, U.K., set out to determine the acoustic mechanisms behind human echolocation.<\/p>\n The researchers recorded the clicks made by the three echolocation experts by measuring soundwaves in an echo-free room. The team placed tiny microphones, suspended by thin steel rods, at 10-degree intervals throughout the room. Both the microphones and the supporting rods had minimal physical profiles in order to reduce noise reflection from equipment. The goal was to record how the mouth clicks traveled through\u00a0the space.<\/p>\n Robbie Gonzalez from\u00a0Wired<\/a><\/em>\u00a0asked Kish what standing in the anechoic room was like. Kish replied, \u201cthe space\u00a0sounded like standing before a wire fence, in the middle of an infinitely vast field of grass.\u201d<\/p>\n The researchers analyzed the sound waves with\u00a0MATLAB<\/a>\u00a0and found that acoustic properties between the three echolocators’ clicks were quite similar. The clicks were characterized as \u201cbright (a pair of high-pitched frequencies at around 3 and 10 kilohertz) and brief.\u201d They tapered off into silence after 3 milliseconds and were concentrated in a narrower path than what is typical for human speech.<\/p>\n Analysis of the acoustic patterns of mouth clicks for human echolocation. Image Credit: PLOS, Computational Biology, Thaler et al<\/p><\/div><\/p>\n <\/p>\n “One way to think about the beam pattern of mouth clicks is to consider it analogous to the way the light distributes from a flashlight,” Lore Thaler, lead author of the study, told\u00a0ScienceAlert<\/a>. “The beam pattern of the click in this way is the ‘shape of the acoustic flashlight’ that echolocators use.”<\/p>\n According to Kish, it takes children two to four days to pick up echolocation. Adults take one or two days longer. He says, \u201cEveryone has different levels of aptitude but everyone can learn to some level of ability that is useful, that makes moving around easier. I don\u2019t think I\u2019ve encountered any blind child or adult who simply couldn\u2019t learn.\u201d<\/p>\n But he has encountered some resistance in the blind community. Some people are uncomfortable with the attention drawn from making the clicking noises. “”In many instances, it’s discouraged,” states Kish. “I personally have worked with students who’ve come from schools for the blind, for whom clicking was actively discouraged.”<\/p>\n For those who are uncomfortable with generating the clicking noise,\u00a0specially-designed devices could provide a more discrete way to utilize echolocation. The research team hopes this\u00a0study will be helpful to build devices that could make echolocation more broadly achievable. The team has provided access to MATLAB code to synthesize the clicks\u00a0here<\/a>\u00a0(downloadable ZIP file).<\/p>\n If you\u2019d like to see human echolocation in action, watch this TED Talk by Daniel Kish, \u201cHow I use sonar to navigate the world<\/a>.\u201d<\/p>\n Dr. Tom Pey,\u00a0chief executive of the Royal London Society for Blind People, told the\u00a0BBC<\/a>,\u00a0<\/em>“Not all of us will be able to do what Daniel does but he’s shown us that it is possible. I really tip my hat to him – long may he continue to be an inspiration for blind people.”<\/p>\n","protected":false},"excerpt":{"rendered":" Echolocation uses sound waves and echoes to determine where objects are located in space. It\u2019s an ability shared by a few, select mammals such as bats, dolphins, and some whales. Did you know that… read more >><\/a><\/p>\n","protected":false},"author":138,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/posts\/1043"}],"collection":[{"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/users\/138"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/comments?post=1043"}],"version-history":[{"count":4,"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/posts\/1043\/revisions"}],"predecessor-version":[{"id":1048,"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/posts\/1043\/revisions\/1048"}],"wp:attachment":[{"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/media?parent=1043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/categories?post=1043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/headlines\/wp-json\/wp\/v2\/tags?post=1043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Determining the acoustics of human echolocation<\/h2>\n
<\/a>Helping the blind learn to use echolocation<\/h2>\n
Echolocation in action<\/h2>\n
<\/div>\n