Tutorials Audio

A History of the Microphone

History · ~18 min

Overview

Microphone history is a sequence of transducer designs (how the device converts sound into an electrical signal), and each design's particular tradeoffs (sensitivity, durability, frequency response, cost) are still the exact same tradeoffs a creator weighs when choosing a mic today.

What You Need

No equipment required. This is a reference and context guide, not a hands-on tutorial

Steps

Carbon microphones (1870s-early 1900s)

The carbon microphone, developed in various forms in the 1870s (with contributions credited to multiple inventors working on telephone technology around the same time, including Emile Berliner and Thomas Edison), used carbon granules whose electrical resistance changed under sound pressure. It was rugged and cheap but had a limited, somewhat distorted frequency response: good enough for intelligible telephone speech, not for music or broadcast-quality voice.

Condenser and ribbon microphones (1910s-1930s)

The condenser microphone (patented 1916, refined through the 1920s) used a charged capacitor diaphragm to achieve a much wider, more accurate frequency response than carbon designs, making it suitable for music and broadcast use, though it required external power and delicate construction. The ribbon microphone (developed in the late 1920s-1930s) offered a distinctively warm, smooth high-frequency response prized for voice and became a broadcast-era standard for its natural sound, at the cost of extreme physical fragility.

Dynamic microphones and rugged reliability (1930s-1950s)

The dynamic (moving-coil) microphone, simpler and far more rugged than condenser or ribbon designs, became the standard for live performance, field recording, and any application where durability mattered more than the last measure of frequency accuracy. A tradeoff still directly relevant to choosing a stage vocal mic today over a delicate studio condenser.

Electret condensers and digital MEMS (1960s-present)

The electret condenser microphone (developed in the 1960s) used a permanently charged material to avoid condenser mics' external polarizing voltage requirement, making cheap, small condenser mics practical for the first time. The direct ancestor of the lavalier and headset mics used throughout video production today. MEMS (micro-electromechanical systems) microphones, a fully digital-era miniaturized design, are what make the tiny built-in microphones in every smartphone and laptop possible, continuing the decades-long trend toward smaller, cheaper, mass-producible microphone technology.

Pro Tips

Every mic-selection tradeoff discussed on this site (condenser for detail vs. dynamic for ruggedness/rejection) is a direct descendant of design tradeoffs established between the 1910s-1950s, not a modern marketing distinction.
The electret condenser's 1960s solution to condenser microphones' external-power requirement is the specific reason lavalier and headset mics can be so small and inexpensive today.
Ribbon microphones' fragility (still true of many modern ribbon mics) is an inherited, physically real design tradeoff, not an outdated stereotype, handle them the way 1930s broadcast engineers had to.

Knowledge Base

What You'll Learn

Microphone technology history is really a history of transducer design tradeoffs (sensitivity versus durability, frequency accuracy versus cost) and those exact tradeoffs, established across roughly a century, still directly inform mic selection for any recording task today.

Quick Timeline

1870s: Carbon microphone, rugged but limited frequency response.
1916 on: Condenser microphone, wide accurate frequency response.
Late 1920s-30s: Ribbon microphone, warm sound but fragile.
1930s-50s: Dynamic microphone, rugged live-performance standard.
1960s-present: Electret condenser and digital MEMS miniaturize the technology.

Why This Still Matters

This site's own microphone buying guides recommend dynamic mics for untreated rooms and loud sources, and condensers for detail-critical studio work. That exact split is the same durability-versus-accuracy tradeoff that has defined microphone design choices since the 1930s.

Where This Fits

This guide covers one specific part of the history of media technology. The wider picture — how each link in the chain from capture through transmission to display was actually built, who built it, and why the credit so often landed somewhere else — is in A History of Broadcast Technology: The Chain From Capture to Screen, which frames the discipline as a whole and links out to the detailed guides underneath it, including this one. If you are starting from scratch rather than solving a specific problem, read that first and come back here.

FAQ

Q: Why are condenser mics considered more 'sensitive' than dynamic mics?
A: A condenser microphone's lightweight charged-diaphragm design responds more readily to smaller sound pressure changes, capturing more subtle detail and a wider frequency range, but that same lightness and sensitivity makes it more susceptible to picking up room noise and more physically delicate than a dynamic mic's sturdier moving-coil design.

Q: What made the electret condenser microphone so important?
A: It removed the need for an external polarizing voltage that earlier condenser microphones required, using a permanently charged material instead. This made small, cheap condenser microphones practical for the first time and is the direct reason lavalier and phone/laptop microphones can be so tiny and inexpensive today.