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Singapore, which is the first airline to start flying the A380, said the suites were not sound-proofed. It said it did not want anyone to offend other travellers or crew.
Singapore added that while the suites were private, they were also not completely sealed.
"All we ask of customers, wherever they are on our aircraft, is to observe standards that don't cause offence to other customers and crew," the airline said in a statement. "Nothing different applies for our Singapore Airlines Suites customers." -BBC News (Thanks Yih!)