how well current nouns mintz be heard there are ways to measure it and operating permits for an airport is only issued when it meets criteria set down in what's called the speech transmission index. in airports the goal we shoot for is 70 percent when you measure here you see that the value actually exceeds that by a little bit to give. serious airport is just one of noise projects he's also been involved in planning cutters national museum as well as a stadium in brazil and a concept house in israel. the field of acoustics is booming demand for expertise is on the rinds in. this i think that how a room is perceived has grown in overall importance in the last few years visual characteristics still have to be harmonious there's no question that still an architect's primary business but air quality temperature and acoustics are also now key aspects of room design. this is especially true when music is involved. in the past ok stations had to calculate complex models a concert. but today computer programs can tell them what a performance will sound like from any seat in the audience before

january and december of last year if the opus is the report ignores its peacemaking successes and prove mintz to security colombia has extended a 2 month nationwide quarantine until the end of june as coburn $1000.00 cases there continue to rise and one slum hundreds of residents will soon be out of a home under up the ante as there. more than 100 families that live in this hillside slum on the southern outskirts of bogota are expected to be evicted in coming days despite having nowhere else to go in this fight to the country still being in the middle of the coronavirus last down many of them have a rival here to build this informal housing fleeing the country's internal conflict others are venezuelan migrants they all say they've been suffering greatly during the lockdown being and able to work with other hundreds of families have already been evicted their houses demolished in the past weeks and the people here say that the police used excessive force to try and push them out of their houses. if you destroy the houses all we can do is build a shelter with the neighbors well we supposed to g

in other world news a fight has broken out in hong kong spawning mintz. there was hearing from pro-democracy politicians after april beijing politician was elected as chairwoman for a key committee it's meant to scrutinise bills in had been without a meter since late last year the backlog of bills includes one that would criminalize mocking china's national anthem and still in hong kong 15 on thai government protesters have appeared in court challenge over last year's mass rallies the group was arrested in a prolific use of helping to organize protests which were banned by the city's authorities un human rights experts have been calling for all of them to be released and for charges to be dropped the 1st hong kong protesters to admit to rioting charges was sentenced to 4 years in prison on friday let's get the latest from adrian brown who's in beijing for us so the group has appeared in court today they have left court now tell us about what's happened. well the 15 activists campaigners figureheads really of the protest movement here in hong kong left wes