Skip to Content
MIT Technology Review
  • Featured
  • Topics
  • Newsletters
  • Events
  • Podcasts
    • Sign in
    Uncategorized

    Volume-Limiting Headphones

    February 24, 2009

    Sounds louder than 85 decibels can cause hearing loss, but most digital music players can exceed that threshold. Headphones and ear buds from iHearSafe of ­Milford, NH, have a volume-­limiting circuit hardwired into the cord. Unlike the software that some concerned parents have used to cap the volume of their kids’ music players, the hardwired circuit can’t be digitally circumvented.

    Product: iHearSafe ear buds,headphones, and ear clips
    Cost: $19.99 for ear buds and $24.99 for headphones or ear clips
    Source: www.ihearsafe.com
    Companies: iHearSafe

    Deep Dive

    Uncategorized

    Our best illustrations of 2022

    Our artists’ thought-provoking, playful creations bring our stories to life, often saying more with an image than words ever could.

    How CRISPR is making farmed animals bigger, stronger, and healthier

    These gene-edited fish, pigs, and other animals could soon be on the menu.

    The Download: the Saudi sci-fi megacity, and sleeping babies’ brains

    This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. These exclusive satellite images show Saudi Arabia’s sci-fi megacity is well underway In early 2021, Crown Prince Mohammed bin Salman of Saudi Arabia announced The Line: a “civilizational revolution” that would house up…

    10 Breakthrough Technologies 2023

    Every year, we pick the 10 technologies that matter the most right now. We look for advances that will have a big impact on our lives and break down why they matter.

    Stay connected

    Illustration by Rose Wong

    Get the latest updates from
    MIT Technology Review

    Discover special offers, top stories, upcoming events, and more.

    Thank you for submitting your email!

    Explore more newsletters

    It looks like something went wrong.

    We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.