Unlike MRI, which produces a magnetic field, this magnetic recorder does not.
From the sciencedaily.com
By 1898 Valdemar Poulsen had demonstrated a magnetic recorder and proposed magnetic tape.
From the en.wikipedia.org
Scott had enjoyed early exposure to a Grundig magnetic tape recorder and microphones, and became obsessed by the technology of capturing and manipulating sound.
From the orlandosentinel.com
While the machine was never developed commercially, it was an interesting ancestor to the modern magnetic tape recorder which it resembled somewhat in design.
From the en.wikipedia.org
The ocean crust would in effect act as a kind of giant tape recorder of magnetic anomalies over time.
From the en.wikipedia.org
The HP-65 came with 51 built-in functions and operations, as well as a tiny magnetic card reader and recorder.
From the time.com
As the lava solidifies, it creates a record of the orientation of past magnetic fields much like a tape recorder records sound.
From the scienceblog.com
In 1949, the company developed magnetic recording tape and in 1950, sold the first tape recorder in Japan.
From the en.wikipedia.org
Recovery of sound from magnetic tape often proves difficult if the recorder is recovered from water and its housing has been breached.