国立アメリカ歴史博物館のインスタグラム(amhistorymuseum) - 5月18日 23時58分

Dolby Laboratories is 50 years old this year. Ray Dolby's inventions included many sound engineering technologies that are so built-in that we now no longer appreciate them. This Dolby type B noise reduction unit is from around 1967.
Learn more about Dolby's innovations on our blog: bit.ly/DolbyHistory50 (Clickable link in profile.) #TurnUpTheVolume #SoundEngineering #Audiophiles #Audio #Dolby #retro #???

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