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Illustration: Sarah Grillo/Axios

The mass adoption of wireless headphones and smart devices, combined with people being home all day and not in public spaces, has created a boom for audio — and every big media and tech company is scrambling to claim a piece of it.

Why it matters: The audio boom is milestone for accessibility and a boon to content creators, but it also presents new challenges for content moderation.

  • "The intimacy of audio could be tailor-made for our shelter in place, contact-free lives," says John Lustyan, Founder & Managing Partner of illum, a media consultancy, told Axios.

Driving the news: Almost overnight, audio chat features have become top-of-mind for Big Tech giants, looking to edge out the up-and-coming social chat app Clubhouse.

Be smart: The social media audio boom mostly centers around ephemeral conversations. Users can open Clubhouse or Twitter (Spaces) and drop in on conversations that are meant to be casual, and not recorded to be listened to later.

In the workplace, the audio boom looks a bit different.

  • Those products, like audio messaging platform Yac, are designed to be asynchronistic, meaning users are meant to listen to pre-recorded messages from colleagues at their leisure.
  • Workplace companies, like Slack, are trying to figure out ways to integrate these types of audio tools into their mostly text-based products. Most video conferencing companies offer users the ability to dial in without having to use video.

By the numbers: The audio content and software boom is happening as new hardware makes listening and voice commands much easier.

  • For the first time ever, wireless headphone and earbud shipments surpassed wired headphones and earbuds last year, according to data from the Consumer Technology Association. Nearly 40% of the U.S. population uses voice assistants, per eMarketer. Roughly a quarter of the adult population own a smart speaker.
  • Music, audiobook and podcast services are expected to reach $10 billion in revenue, up 19% over last year, per CTA. Audiobooks are the fastest-growing sector within the book publishing industry, according to The Association of American Publishers.
  • Spotify says it now hosts 2.2 million podcasts, up from 700,000 in 2019.
  • The audio boom has triggered a mergers and acquisitions frenzy, especially around podcast companies.

The big picture: Audio presents enormous opportunities for brands and content creators to reach people in a more accessible way — when they're on-the-go or using their eyes for some other activity. But the scale of audio conversations will make it very difficult to fact-check conversations or stop bullying and harassment in real-time.

  • Already, we're seeing some of these issues play out. Clubhouse — which requires an invite to access — is reportedly already being blocked in China, and it's starting to face allegations that the platform isn't adequately built to stop harassment.
  • Facebook said Thursday on a call with reporters that it's exploring ways to monitor audio content, as well as any type of mixed media content, for harmful or illegal things that violate its rules.

Go deeper:

Go deeper

Teachers across the U.S. protest laws restricting racism lessons

Thousands of teachers and other educators held protests across the U.S. Saturday against the actions of "at least 15 Republican-led states" that aim to restrict teaching about racism in class, the Washington Post reports.

Driving the news: There were demonstrations in at least 22 cities for the "Day of Action" to raise awareness about moves to limit students' exposure to critical race theory, which links racial discrimination to the nation's foundations and legal system, per Axios' Russell Contreras.

Updated 5 hours ago - Health

Lawsuit challenging Houston Methodist's COVID vaccine mandate dismissed

Houston Methodist Hospital in Houston, Texas. Photo: Brandon Bell/Getty Images

A federal judge on Saturday dismissed a lawsuit brought by 117 Houston Methodist staff over the hospital's policy requiring all employees to be vaccinated against COVID-19.

Why it matters: This is the first federal court ruling on a coronavirus vaccine mandate. Attorney Jared Woodfill, representing the plaintiffs, told KHOU 11 it's "the first battle in a long fight," as he vowed to file another lawsuit soon.

G7 leaders to announce plan to phase out gasoline cars

British Prime Minister Boris Johnson talks next to President Joe Biden and French President Emmanuel Macron at the G7 summit in Carbis Bay, Cornwall, England, on Saturday. Photo: Leon Neal/Getty Images

G7 leaders are set to announce Sunday a range of measures to tackle climate change, including "ending almost all direct government support" for fossil fuels and phasing out gasoline and diesel cars.

Driving the news: The plan was outlined in a British government announcement Saturday, which states that the leaders will also agree to halting "all unabated coal as soon as possible."