durk noise listens for a living the physicist advises builders an architect on all things acoustic for example on how to lower noise levels. in a historical context people always interpret noise as trouble right something's going on dinosaurus coming or a volcano is erupting it causes an instinct to flee to kick around when it's really noisy we have these associations with pressure with a stressful situation. syria airport in switzerland is pretty noisy at least for the people who live nearby but inside all is calm and quiet acoustics were taken into account in the airport's design the key concept is isolation there are several layers of glass built in here one after the other and taken together they provide a very high level of sound proofing inside you really aren't subjected to any adverse of facts from the noise levels you'd hear outside. but what about the more than 30000000 people who stream through the airport every year surely they make a lot of noise of the day the ceiling is clouded with sheets of metal and some of them are perforated those perforations allow the sound waves

to love you, again, as-- as bernie sanders. ( applause ) bernie sanders is my guest tomorrow night durksst a dozen times. >> this seems a little dangerous. you could spill it. >> stephen: i know what i'm doing. >> are you aware -- >> stephen: i'm not going to do anything. >> are you completely aware as you're talking. >> stephen: 100%. look at that. >> yeah, good. >> stephen: nothing. >> i'm slightly concerned. >> stephen: they don't give thu job unless you can do that. >> i think this is a very precarious position this cup. why is it not over here why do you have two chairs? do you have two people. >> stephen: last night, bobby cannavale, and his wife were on. they're doing "medea" at bam. >> that would be great. >> stephen: i sometimes do have two guests over there. do you ever go on tv shows with someone else? >> are you nuts. >> stephen: back in the day i thought you and-- seinfeld might have-- >> no. >> stephen: no? >> i think we have a very good rapport. yeah. ( laughter ). >> stephen: i'm-- again-- that sounds like you're trying to end the interview. >> no, no, no. >> stephen: tha

kent durks actually write a memo documenting your concerns that there was an effort underway to pressure ukraine to open an investigation to benefit president trump? >> yes, ma'am. i wrote a memo to the file on august 16th. >> we don't have access to that memo, do we? >> i submitted it to the state department subject to the september 27 subpoena. >> and we have not received one piece of paper from the state department relative to this investigation. secretary kent memorialize ad september 16 conversation in which ambassador taylor described a ukrainian official accusing america of hypocrisy for advising president zelensky against investigating a prior ukrainian president. mr. kent described that conversation during his testimony. he said, but the more awkward part of the conversation came after special representative volker made the observation that the ukrainians who had opened their authority under president zelensky had opened investigations of former president paracinco. he didn't think that was appropriate. and then, andrei yermak said what? you mean the type of investigations you'r