the united states's special representative to ukraine, kurt volker, has resigned. it comes after a whistle—blower claimed donald trump put pressure on ukraine's president to investigate joe biden, the democratic frontrunner in the race for the white house. it's been claimed that kurt volker helped mr trump's personal lawyer, rudy giuliani, arrange meetings in ukraine — even though mr giuliani had no official role in the us government at the time. the us secretary of state mike pompeo has been ordered by the house of representatives to hand over documents to an impeachment inquiry looking into the donald trump's dealings with the ukraine government. mr pompeo will have a week to comply with the subpoena. nigerian police say they've rescued nearly 500 people from a building in the northern city of kaduna where they were being detained. those held were all men and boys, and said they'd been tortured and sexually abused. and, 22 years on, walking in his mother's footsteps. prince harry has visited a partially—cleared minefield in angola. the duke of sussex described the visit as "quite emotional".
it is1:30 in it is 1:30 in the morning. now on bbc news it's time for click. this week, smash hits, smash hits, and extreme mike testing. welcome to bbc news. i'm maryam moshiri. our top stories: pressure on the white house. the us secretary of state, mike pompeo, is given a week to hand over documents relating to ukraine, as the democrats step up the trump impeachment investigation. meanwhile, the special representative to ukraine, kurt volker, has resigned after being named in the whistle—blower report. afghanistan steps up security thursday was bbc music today, an as nine million voters choose their next president annual celebration of the power of despite threats of violence music to change lives, would 2000 by the taliban. events across the uk and 100 22 years on — prince harry follows broadcasts on tv, radio, and in his mother's footsteps, digital. —— with 2000. but it is with a visit to the minefields in angola. important to remember that not eve ryo ne
important to remember that not everyone expends a sound in the same way. for example, this week is international week of the deaf. so we met twins herman and her road. now, they are both deaf, and although they love going to raves, there is a lot about music they don't experience, until now. we joined them when they tried on a prototype shirt which can turn music into a whole body experience. we we re into a whole body experience. we were born hearing, and when we became seven —— one with ten seven we became deaf at the same time. everything changed. we lost our hearing, we can speak anymore, we felt quite isolated.
the beautiful rolling hills of the south downs in sussex. something which i'm about to see from a whole new perspective. up there. i'll be filming myself while i'm up there, but the most important thing for todayis but the most important thing for today is this microphone, which i'll be taking up with me. why? tell you what. let's go back to the beginning. if you've ever tried to record sound outside or even if you tried making a phone call on a breezy day, you will know that wind is the enemy. even the slightest breeze causes turbulence on the mic, which you hear is a pretty deafening roar. now the best way to solve this problem is to stop the wind from getting to the mic by using something like this, a fluffy or a dougal, or a dead cat. the bigger
the fluffy the better the wind is blocked out, but there are times when a large microphonejust isn't convenient. like, for example, when you're doing back flips through a snowy street, travelling at speed over not very much snow. energy drink makerand over not very much snow. energy drink maker and extreme sports nuts red bull wanted to record the athletes up close and personal, so they asked a hearing aid, headphone, and microphone designers to make something small, light, and cable free to stick in places where there is no room for a big fluffy. the research into noise cancellation and sound enhancement goes on here at their headquarters in copenhagen. and this is where the x mike was born. because they need to test their devices and lots of different audio conditions they have different rooms with different acoustic characteristics. this is the
anechoic chamber which is completely acoustically dead. this is the chamber where they test noise cancellation. and this is the wind tunnel where we currently have a breeze of two metres per second. but if we increase that to eight metres per second you should start to hear a lot of rumbling on my microphone here, which will be quite unpleasant to listen to. and if we take it all the way up to 15 metres per second, my guess is that you are really struggling to hear what i am saying... inaudible. if you switch to the x mic audio, i'm hoping use and still be able to hear what i'm actually saying. all right. this really is maxing out the wind tunnel and even the prototype x mic is struggling. but, obviously,
it's still doing a lot better than oui’ it's still doing a lot better than our mic. part of the secret is in the soft, fluffy fabric, but is in the soft, fluffy fabric, but is in the round shape which reduces turbulence, and parties in the digital signal processing dsp algorithms which subtract the windows from the recording as being made. what we have done is we have learned through years and years of testing what is wind frequency and what is other sound frequency. and then we said those dsp algorithms to make sure we block out the frequencies that we believe are wind, what frequency raised we want to block out and what we want to keepin to block out and what we want to keep in let through? so the x mic mark one has done 0k, keep in let through? so the x mic mark one has done ok, but not elliot lee in the wind tunnel. but how will the mark to do in the wild —— but not brilliantly. we will find out a bit later when they finally get my amateur backside off the hill. —— when i've finally.
hello and welcome two there week in tech. it was the week that facebook said it would not fact check politicians. the social media giants as posts by politicians are newsworthy and should be seen and heard. amazon announced that alexa will soon be able to bring the voices of samuel ljackson and other celebrities into your home. their speech will be computer—generated based on voice recordings provided by the staff. and the port of antwerp has unveiled a hybrid hydrogen diesel tugboat to replace the gas guzzling diesel only ones usually used to guide container ships. remember boston dynamic‘s spot the dog, it can climb hills, pick up objects, and open doors and is now available to rent for less than the cost of a car, although you may not be able to use it to do the school run. it has also said the headlines this week with the company's headlines this week with the compa ny‘s gymnast bot.
headlines this week with the company's gymnast bot. atlas does handstands, roles, and jobs that could rival and acrobat. and, finally, in other robot news, could these shape shifting creations provide a whole host of useful tasks? shape bolts are controlled by a central computer and camera trackers and hope to protect you from hot drinks built on tabletops, create moving 3—d maps, and more. that's all very well, but i'm still waiting for a robot to be able to just do my laundry and cook dinner. sounded something that is around all of us all the time. when we identify those sounds as signifying danger, we have evolved to recognise those sounds and react to. —— react to them. in the modern world we have become ever more used to isolating
ourselves from the world around us. for most people, recognising those sounds are something we do every single day, but getting devices to recognise different sounds is something that has traditionally been challenging. now, one uk—based company claims to have cracked that problem. audio analytic has developed a new technology to recognise a wide range of sounds that can then be used as a trigger for a number of different actions. what this technology does is it is softwa re what this technology does is it is software based artificial intelligence to identify and recognise everyday sounds. and it can be integrated into a number of products. i will show you a couple of exa m ples products. i will show you a couple of examples of how it might work stop one common application is in headphones. walking down the street for example, there is an angry dog nearby. barking. caution, there is a dog nearby. increasing transparency. in that
situation it would recognise a dog barking, lowered the music or cut out in your headphones and warn you there is a dog nearby. in smart speakers, most of us have these things around the home now, and it could be arranged to listen passively for things like a baby crying. baby crying. sound recognition is different from speech recognition, and we have had to come in and sold some of those fundamental differences, baby crying sounds very different from another baby crying. there is a huge diversity from when they are six months old to two years old. but all of that we refer to as "baby cry". so there is some commonality and we need to teach those machines that commonality. but as we know, ai can only ever be as good as the training data it works with. so they have to ca ptu re data it works with. so they have to capture these sounds live. naturally, wanted to witness this firsthand. and what better way to start, then with a couple of very good dogs. this is an anechoic
chamber, or in this case, semi— anechoic chamber. it is designed to absorb sound. we are here to record these two, hopefully barking on demand. barking. these waveforms i can see on this screen are representations of what is coming off the microphone is in there. and in the actual dog bark threshold that the system is listening for. when it identifies them, you should hear it activate. listening for. when it identifies them, you should hear it activatelj can them, you should hear it activate.” can hear you barking. as it is late and you are home alone, i will alert your owner, termites and put on jazz, because i know how much you like it. nice. but dogs, as good as they are, only the beginning. space here can be used to record anonymous range of sounds, ranging from the dramatic... to them all 0k. —— to the more low—key.
bell rings. there is no shortcuts to this, you have to have the data set. we have to go and collect all the data, we have the world ‘s largest collection of audio data, 15 million files, that help us train the technology itself. and because we could not leave without taking a sledgehammer to some windows. crashing. all in the name of technology of course. that was paul. i'm back at the south downs hills where it is time to test the jabra microphone, design to reduce noise in extreme sport and record high quality audio on this tiny device. i am putting it against the best professor mike we have that is even vaguely portable, in that it cabled to a zoom recorder
and stuffed into my pocket. exactly what you don't need in extreme sports. and for a more realistic comparison, i also record sound on my phone and my gopro. now all i have to do is run. run, run like the wind! yeah! (laughs). wow! so we are up, and the wind is definitely blowing in my face. we are flying at about 25 mph at the moment, so we are —— is now time to see what all the microphone sound like. loud wind noise. although you can hear my voice on my phone and they go broke the wind noise is pretty intrusive. it would certainly blast out the subtleties
that jabra was specifically asked to ca ptu re. that jabra was specifically asked to capture. how about our high—quality mic with all its cables, versus the relatively small x mic, with no ca bles relatively small x mic, with no cables and on—board recording? i have no idea what these are recording, but as you watch we will switch from this normal mike to that jabra x mic, and i will guess that you will instantly hear the difference, you should hear something that is a lot clearer, and with very little rohrer of wind noise. although my voice is pretty clear in both recording, the background wind is definitely reduced. so much so in fact that we can hearjess all the way behind me, telling me about paragliding in the himalayas. what is paragliding 12,000 feet like, is a different experience? everything is more full on in the mountains. so the developments in the weather, and
understanding the cloud, and just loads of amazing birds, huge, massive vultures. interestingly, the x mic is not going on general sale. instead, jabra are using it as rnd for its existing, more down—to—earth products. if we can get a microphone to work at 100 kilometres an hour down a ski slope you can bet that an office, noisy office, you can make a very good phone call without any noise disturbance. i am about to cause a disturbance in this freshly ploughed field. so wish me luck. all right, we are about to land. we are
going to come in to land. we will come with my speed, and like a bird landing ona come with my speed, and like a bird landing on a branch, just before we touched down, i pull the brakes and... yes, yes. i smashed it without smashing it, which is brilliant. this ego dome, amsterdam. performing here is the legendary sir eltonjohn. currently on his farewell tour. but he has added a little something extra to each night and it is called peaks. it is a device that allows you to mix live music as it is being played in front of you. first the volume of incidents, listen to nothing but eltonjohn's voice, but how does it work? # benny and thejets... first of all the music is record under the system where it breaks down the 95 channels of audio coming from the stage into five different musical categories. those five mixes are then sent all the way here to the back of the hall and sent out again as radio waves by these transmitters. but to make sure eve ryo ne these transmitters. but to make sure everyone gets a signal, five more transmitters have been permanently installed above the stage. and a
tiny microphone on the device listens to what is being played on stage, so it can sync up with a mix that your device is being sent, so when you adjust the levels, it will be in real time. people when you adjust the levels, it will be in realtime. people are paid a lot of money for concert tickets, and people in the seats, if you can give them better quality sound, it will make everybody happy. all right, elton john is will make everybody happy. all right, eltonjohn is about to start performing. let's see how this thing fa res. guitar sound. keyboard sound. drums sound. wow. that sounds great. the vocals are crisp, you can really hear the
guitar, but because i am too close to the stage, i can't really distinguish what i'm hearing on stage and on here with the drums. so what i'm going to do is go to the back of the hall and see how it fa res back of the hall and see how it fares there. it works even better further back from the stage. to listen to the mix you given normal earphones earphones instead of noise cancelling, so you don't lose out on hearing the atmosphere two. the people who are hard of hearing, you do have locations in the concert hall where people can come and hear this, allows them to actually be anywhere in the concert hall. it is not for everyone, there are people who already have superior sound quality and they do not wish to have it improved, but there are people who want to experience concerts in a different way, so it is really allowing for everyone to opt into how they want to experience the concert. and that is what we found. not everybody enjoyed using it. concert. and that is what we found. not everybody enjoyed using itm is an amazing system, and i even like people next to me listen to it
but it is like, you have to be very sure of yourself to use that system as an artist. the music was very loud, you have to put that even louder, so it's going to be like... losing your ear. the sound is really clear, i'm not sure eltonjohn concert is the best concert to use it out because the sound mix is really good here. you heard it around you, but in the mean time you are isolated as well. yeah! elton! exactly, like that. as innovative as this kid is it may not be for you that you may just want to go to this kid is it may not be for you that you mayjust want to go to a concert and experience it organically. but having the option to mix your favourite artist while they perform in front of you, this might bea they perform in front of you, this might be a new direction in live music. drums play. 0mar mixing music with the maestro, brilliant. and that's it for our audio tech special. hope you enjoyed
watching and listening to it, and don't forget you've throughout the week you can find us on facebook, you instagram and twitter. thanks for watching and we will see you soon. i tried running too soon! hello there. if you are out across the northern half of the uk in the next few hours, and you have clear skies, you may be treated to the northern lights. but it has been a very turbulent end to the week, and it is going to be a rather wet and windy weekend for many of us, and there is growing concern with this next deep area of low pressure now developing, that more rain on already saturated ground, with river levels high, will result in further flooding.
as well as that we have some strong winds around this low pressure system coinciding with high tides, because of the new moon, the full moon, so there could be coastal flooding too. a band of rain moves across northern ireland, northern england, southern scotland, any mist and fog to the north will clear away, showery rain across northern areas does tend to ease, the showery rain further south eases away, so a day of sunny spells and showers, probably not as heavy showers today as we saw yesterday, but nevertheless, they are still around, still wet. it should feel pleasant enough with light winds and sunshine, but as the day progresses, the afternoon progresses we are in for a big change, there's more tropical air tied in with this area of low pressure, so there will be widespread, heavy intense rain, some thundery rain in there as well, and strong to gale force winds blowing in that rain and coinciding with high tides, we could have coastal inundation. so really wet and windy through the night as we move into sunday. and that rain is really slow to clear, could be scotland and northern ireland escape the worst of the rain, and as the day goes on we change our wind direction and pick up a colder north—north—westerly, but that will have a sting in its tail, you can see for england and wales, which has more rain
re—entering around the area of low pressure. so temperature really academic on sunday but feeling colder in the north, later in the day as winds switch direction they may have a sting in the tail, we would have strong to gale force winds crossing into wales and later england and down the north sea coast, but potentially corresponding or tying in with high tides here, so we will concern ourselves with some coastal flooding here as well late on sunday. lots to keep our eye on, it looks really unsettled through the weekend, heavy rain, gales, there are warnings out from the met office, there on the website, and those high tides as well. further afield we are expecting rain for the rugby which continues into the weekend, japan—ireland on saturday, potentially having some heavy downpours around here, and for australia—wales, i would not like to rule out downpours either. it is much cooler, though,