They're called "podcasts"
Briefly

Before podcasts became known as podcasts, they began as "audio blogs" in 2004, when "iPod" and "broadcast" merged. This led to significant growth and innovation.
The history of podcasting is debated, with contributions from early pioneers discussing format, technology and industry norms in a Yahoo mailing list, not realizing the future impact.
Podcasting has evolved dramatically, moving from simple audio blogs to encompassing award-winning investigations and narrative fiction, showing its potential beyond just informal shows.
Companies like Spotify and Amazon sought to create audio empires through lucrative contracts in the podcasting space, but have struggled to make it fully contemporary.
Read at The Verge
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