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noun. uk / saʊnd / us / saʊnd / sound noun (NOISE) Add to word list. A2 [ C or U ] something that you can hear or that can be heard: hear a sound They could hear the sound of a bell tolling in the distance. make a sound She stood completely still, not making a sound. Suddenly we heard a loud knocking sound from the engine.
In physics, sound is a vibration that propagates as an acoustic wave through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. [1] .
Jul 1, 2012 · 1. a. : a particular auditory impression : tone. b. : the sensation perceived by the sense of hearing. c. : mechanical radiant energy that is transmitted by longitudinal pressure waves in a material medium (such as air) and is the objective cause of hearing. 2. a. : a speech sound. a peculiar r-sound. b. : value in terms of speech sounds.
Sound, noise, tone refer to something heard. Sound and noise are often used interchangeably for anything perceived by means of hearing. Sound, however, is more general in application, being used for anything within earshot: the sound of running water.
a periodic disturbance in the pressure or density of a fluid or in the elastic strain of a solid, produced by a vibrating object. It has a velocity in air at sea level at 0°C of 331 metres per second (741 miles per hour) and travels as longitudinal waves. b. ( as modifier) a sound wave.
Sound, a mechanical disturbance from a state of equilibrium that propagates through an elastic material medium. A purely subjective, but unduly restrictive, definition of sound is also possible, as that which is perceived by the ear. Learn more about the properties and types of sound in this article.
A sound is a noise, something you can hear if you're in the right spot and it's loud enough. A doorbell, a fire alarm, a cat's meow, or your brother's snoring — they’re all sounds. Long Island Sound is another kind of sound — it’s a branch of the Atlantic Ocean that runs between Connecticut and Long Island, New York.
I heard the sound of laughter in the room next door. The crowd scattered at the sound of gunshots. the sound of sth informal. how something seems to be, from what you have been told or heard: I like the sound of the beef in red wine sauce. He's really enjoying college, by the sound of it.
Definition of sound noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
sound. noun. /saʊnd/ something you hear. [countable] something that you can hear synonym noise a high/low sound a clicking/buzzing/scratching, etc. sound the different sounds and smells of the forest She heard the sound of footsteps outside. He crept into the house trying not to make a sound. Definitions on the go.
