Earbuds, in the sense of in‑ear headphones, trace back to 1891, when French engineer Ernest Mercadier patented a tiny “bi‑telephone” receiver that could sit inside the ear canal and is widely considered the first true earbud‑style device. Modern mass‑market music earbuds only took off much later with portable audio, especially from the late 20th century onward.

Quick Scoop

The very first “earbuds” (1891)

  • In 1891, Ernest Mercadier patented a lightweight in‑ear telephone receiver described as a “bi‑telephone.”
  • His design used miniature drivers that could be inserted into the ear canal and even proposed rubber coverings to reduce friction, making them surprisingly close to today’s earbuds and IEMs.
  • These early earbuds were meant for telephone and communication use, not personal music listening, because consumer audio technology was still in its infancy at the time.

From early headphones to pocket music

  • By the late 1800s and early 1900s, bulkier head‑mounted receivers and over‑ear headsets became common for telephone operators and military radio, rather than in‑ear buds.
  • In 1910, inventor Nathaniel Baldwin built one of the first modern over‑ear headsets in his kitchen; they were adopted by the U.S. Navy for radio use.
  • Through the mid‑20th century, headphone evolution focused on over‑ear and on‑ear designs (like Beyerdynamic’s DT48 in 1937 and later hi‑fi models), while true earbuds remained a niche concept.

When earbuds became mainstream

  • Lightweight “earbud” and small on‑ear sets started to follow the rise of portable radios and cassette players in the 1950s–1970s, but they were not yet the standard.
  • The big cultural shift came with portable players such as the Sony Walkman in 1979, which popularized compact personal listening and opened the door for truly small, on‑the‑go earphones.
  • In the early 2000s, devices like the Apple iPod normalized simple, minimal white earbuds as the default way to listen to music privately, cementing earbuds as an everyday accessory worldwide.

Today’s in‑ear world

  • Modern earbuds and in‑ear monitors build on Mercadier’s basic idea—miniature drivers in the ear canal—but add features he could never have imagined, such as multi‑driver designs, silicone tips, active noise cancellation, and wireless Bluetooth connectivity.
  • True wireless earbuds, which emerged in the 2010s and exploded in popularity by the 2020s, are the latest step in this more‑than‑130‑year evolution of in‑ear listening.

In short: if the question is “when were earbuds invented?” the deep‑cut answer is 1891 (Mercadier’s in‑ear “bi‑telephone”), even though the everyday, music‑player earbuds most people think of only became common in the late 20th and early 21st centuries.

TL;DR: Earbuds were “invented” in 1891 as in‑ear telephone receivers, but they only turned into the familiar music earbuds people know today once portable audio and digital music devices went mainstream decades later.

Information gathered from public forums or data available on the internet and portrayed here.