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Synonyms

soundproof

American  
[sound-proof] / ˈsaʊndˌpruf /

adjective

  1. impervious to sound.


verb (used with object)

soundproofs, present (3rd person singular) soundproofed, past participle, past soundproofing present participle
  1. to cause to be soundproof.

soundproof British  
/ ˈsaʊndˌpruːf /

adjective

  1. not penetrable by sound

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (tr) to render soundproof

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

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Conjugated Forms

Present

Past

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Etymology

Origin of soundproof

First recorded in 1875–80; sound 1 + -proof

Explanation

When you soundproof a room, you insulate it so that less noise can be heard outside it. A musician who records albums in her apartment might soundproof the room in which she keeps her drums. If you practice playing the bagpipes daily, you might want to soundproof your house so you won't bother your neighbors. Alternately, if you record books on tape in your bedroom, you could soundproof the room so that outside noises won't interfere with your work. You can also use soundproof as an adjective: "The party was in a soundproof room in the hotel, so we could turn the music up as loud as we wanted."

Keep Reading on Vocabulary.com

Vocabulary lists containing soundproof

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Adjacent to the resort-style pool, is the fully soundproof studio, which comes complete with high ceilings and natural light, and can be used as a workspace, guest quarters, and more.

From MarketWatch May 28, 2026

Its standout artifacts include Voltaire’s custom-designed gilded armchair, equipped with a writing desk and drawers, and a re-creation of the bedroom of Marcel Proust, including a piece of his famously cork-lined, soundproof walls.

From The Wall Street Journal May 10, 2026

Each person sat in a soundproof room and focused on a fixed cross displayed on a screen.

From Science Daily Dec. 23, 2025

On Tuesday, Manuel Vicente sat behind his makeshift desk in a soundproof room at the Pasadena Community Job Center, which helps connect day laborers with employment opportunities.

From Los Angeles Times Jun. 19, 2025

The perfect place, a little fortress where a soldier can get some R & R. I'm headed for one of those soundproof listening rooms.

From "Things Not Seen" by Andrew Clements

In the summer of 2012, prosecutors say, one of those bedrooms was soundproofed.

From The Wall Street Journal Jan. 18, 2026

“I hate this weather,” he says as he peers through a soundproofed window he claims would keep us from hearing two cars smashing into each other right out front.

From Los Angeles Times Feb. 28, 2024

I’ve got nice recliners, a big screen, high-end projectors, a great sound system and the room is fully soundproofed.

From New York Times Oct. 25, 2022

“I spent a good six months making it. Every time I bought new equipment or soundproofed, I thought, ‘Gosh, is this going to be worth it?’

From Seattle Times Nov. 26, 2021

Sometimes I feel like we’re on opposite sides of a soundproofed glass wall.

From "The Sun Is Also a Star" by Nicola Yoon

“The main residence was custom-designed by a musician with advanced soundproofing, and includes a home theater, office, formal living room, and five ensuite bedrooms,” according to the listing.

From MarketWatch Apr. 23, 2026

Many nightclub fires share a common factor: flammable soundproofing foam and interior finishes that cover much of the space and can ignite easily.

From The Wall Street Journal Jan. 4, 2026

The mini-fireworks were being waved near the basement bar's low wooden ceiling, covered in thin soundproofing fabric, according to the images on social media.

From Barron's Jan. 2, 2026

They tore through the building, sending clouds of soundproofing material through kindergarten classrooms.

From Salon Jun. 29, 2025

I didn’t want to hear the outside world, either, but I hadn’t been able to improve upon the apartment’s existing soundproofing.

From "Ready Player One: A Novel" by Ernest Cline

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