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decibel
noun
deci·bel ˈde-sə-ˌbel 
-bəl
-bəl 1
a
: a unit for expressing the ratio of two amounts of electric or acoustic signal power equal to 10 times the common logarithm of this ratio
b
: a unit for expressing the ratio of the magnitudes of two electric voltages or currents or analogous acoustic quantities equal to 20 times the common logarithm of the voltage or current ratio
Did you know?
The unit for measuring the relative intensities of sound is called a decibel. Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of little more than 3 decibels. In common practice, the reference point of 0 decibel is set at the intensity of the least perceptible sound, the threshold of hearing. On such a scale a 10-decibel sound is 10 times the intensity of the reference sound; a 20-decibel sound is 100 times the reference intensity, and so on. Normal conversation is usually around 60 decibels, an electric saw around 100 decibels, and amplified rock music around 120 decibels.
Synonyms
Example Sentences
a rock concert blasting music at 110 decibels the crowd decibels increased dramatically as the horses neared the finish line
Recent Examples on the Web Rachel Buxton, an assistant professor of conservation biology at Carleton University in Ottawa who has studied the impact of noise pollution in rural areas, says that even a five decibel increase can have a dramatic impact. 
Rekha Tenjarla, Washington Post, 31 Aug. 2022 Days earlier at practice, no player was out of range of Inserra’s basso profundo voice, which capably battled low-flying jets from nearby O’Hare International Airport for decibel dominance. George Castle, Chicago Tribune, 29 Aug. 2022 This phobia is heightened as the intensity of the storm, likely measured by the vigor of the lightning or decibel level of the thunder, amplifies. Marshall Shepherd, Forbes, 10 Aug. 2022 Next to me sits a mezcal salesman, talking loudly into his cell phone over the din and hum of the world around him, as the decibel volume hovers at around 80. Jordan Michelman, San Francisco Chronicle, 29 July 2022 The new ordinance would rely on setting decibel limits throughout the city. Wells Dusenbury, Sun Sentinel, 10 June 2022 But before that scene and without dialogue or even a single decibel, Hamaguchi re-creates the utter overwhelm of being suspended in grief, love, and regret, and the paralysis of not being able to do anything but simply exist within those feelings. Nina Li Coomes, The Atlantic, 5 Mar. 2022 Parks and nearby residents used decibel counters on their iPhones to record the din of machinery, and zoom lenses to photograph workers dressed in hazmat gear just feet away from where people lived and raised children. Emily Witt, The New Yorker, 3 Mar. 2022 Parents can set the decibel limit with buttons on the headset. Jim Rossman, Dallas News, 26 Aug. 2021 See More
Rekha Tenjarla, Washington Post, 31 Aug. 2022 Days earlier at practice, no player was out of range of Inserra’s basso profundo voice, which capably battled low-flying jets from nearby O’Hare International Airport for decibel dominance. George Castle, Chicago Tribune, 29 Aug. 2022 This phobia is heightened as the intensity of the storm, likely measured by the vigor of the lightning or decibel level of the thunder, amplifies. Marshall Shepherd, Forbes, 10 Aug. 2022 Next to me sits a mezcal salesman, talking loudly into his cell phone over the din and hum of the world around him, as the decibel volume hovers at around 80. Jordan Michelman, San Francisco Chronicle, 29 July 2022 The new ordinance would rely on setting decibel limits throughout the city. Wells Dusenbury, Sun Sentinel, 10 June 2022 But before that scene and without dialogue or even a single decibel, Hamaguchi re-creates the utter overwhelm of being suspended in grief, love, and regret, and the paralysis of not being able to do anything but simply exist within those feelings. Nina Li Coomes, The Atlantic, 5 Mar. 2022 Parks and nearby residents used decibel counters on their iPhones to record the din of machinery, and zoom lenses to photograph workers dressed in hazmat gear just feet away from where people lived and raised children. Emily Witt, The New Yorker, 3 Mar. 2022 Parents can set the decibel limit with buttons on the headset. Jim Rossman, Dallas News, 26 Aug. 2021 See More Word History
Etymology
International Scientific Vocabulary deci- + bel
First Known Use
1928, in the meaning defined at sense 1a
Time Traveler
The first known use of decibel was in 1928 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
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