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.
Credit: Joshua Scott
Product: iHearSafe ear buds,headphones, and ear clips
Cost: $19.99 for ear buds and $24.99 for headphones or ear clips
Other products in this section:
Become an Insider to get the story behind the story — and before anyone else.
Subscribe to Continue Reading
Uh oh–you've read all of your free articles for this month.
How DARPA Took On the Twitter Bot Menace with One Hand Behind Its Back
When DARPA ran a competition to find Twitter bots designed to influence online debates, it inspired a new generation of anti-bot strategies.
How One Intelligent Machine Learned to Recognize Human Emotions
Nobody knew how to identify people’s emotional states by looking at their brain waves. Then a machine learning algorithm stepped in.
How an AI Algorithm Learned to Write Political Speeches
Political speeches are often written for politicians by trusted aides and confidantes. Could an AI algorithm do as well?