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I am not advocating the use of any headphones, but this is the first "open back" headphone, introduced in 1968, the Sennheiser HD414. Sennheiser called them "Open-Aire". The company sold 10 million of these. I had them, and used to order replacement earpads when needed.
Are these "over the ear" headphones, as opposed to the ones you stick into the ear? Are Bose noise cancelling over the ear headphones considered to be "open back headphones"?
I am not advocating the use of any headphones, but this is the first "open back" headphone, introduced in 1968, the Sennheiser HD414. Sennheiser called them "Open-Aire". The company sold 10 million of these. I had them, and used to order replacement earpads when needed.