Turntable video of a voice recorder (dictation machine) working with Micro Cassettes. The depicted model is an AIWA TP-M320, made in China around 1988. The innovative feature of this analog device is the activation of the recording mode via voice input. AIWA called it the "V-Sensor". The TP-M320 also offers a noise reduction.
<a href="//commons.wikimedia.org/wiki/User:Maximilian_Sch%C3%B6nherr" title="User:Maximilian Schönherr">Maximilian Schönherr</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>