loudness

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Highway Night Traffic Portland, drive, driving, car, automobile.

What's the Difference Between Speed and Velocity?

$Light refraction image with a cube. Prism$

How Is Light Both a Particle and a Wave?

Above the clouds 130 nautical miles below, astronaut Mark C. Lee floats freely without tethers as he tests the new Simplified Aid for Extravehicular Activity (EVA) Spacewalk Rescue (SAFER) system, Sept. 16, 1994. Space Shuttle Discovery, STS-64

Gravity: From Apples to the Universe

Discover

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Jackson (Wyoming, United States). Jackson Lake (also called Jackson Hole), southern end of the Teton Range (the Grand Tetons), Grand Teton National Park, Wyoming, USA

7 Wonders of America

Christmas tree, holiday, pine

How Did the Tradition of Christmas Trees Start?

Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Mount Everest (Mt. Everest, mountains, Himalayas).

Is Mount Everest Really the Tallest Mountain in the World?

loudness: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	volume • sound pressure level • SPL

Topics

sound intensity phon sone sound sound reception sound production timbre Doppler effect tone acoustic impedance speed of sound musical sound ultrasonics infrasonics

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