Soundproof Karaoke Microphone
The Soundproof Karaoke Microphone is just what the American Idol wannabes ordered. No more threats from your neighbours and not more jeers from your dog. Now they can sleep soundly since you’ll be the only one who can hear your Crazy Frog songs. When the stress comes a-knocking, break out the Soundproof Karaoke Microphone for some Boys II Men sessions and you’ll be glad your lungs are cleared.
However, singing out of tune could be annoying for some people, so if you want to practice for your next karaoke session, you can use “Bou-on maiku myuto” (bou-on= soundproof, noiseproof; maiku=microphone; myuto=mute). It is advertised as “The best secret training! You can sing in the loudest voice while your family and neighbors sleep. You can also release stress, for example when you want to shout four-letter words without others noticing”.
Source | Main site for Soundproof Karaoke Microphone