Loudness


Also found in: Dictionary, Thesaurus, Medical, Legal, Idioms, Wikipedia.
Related to Loudness: loudness unit, Loudness war

loudness

[′lau̇d·nəs]
(acoustics)
The magnitude of the physiological sensation produced by a sound, which varies directly with the physical intensity of sound but also depends on frequency of sound and waveform.

Loudness

 

a quantity that characterizes auditory sensations for a given sound. Loudness depends in a complex way on sound pressure (or sound intensity), frequency, and form of vibrations. Where frequency and form of vibrations are constant, loudness increases with an increase in sound pressure. Where sound pressure is the same, the loudness of pure tones (harmonic oscillations) of different frequencies is different—that is, at different frequencies sounds of different intensity can have the same loudness. The loudness of a given frequency is evaluated by comparing it with the loudness of a simple tone of 1.000 hertz (Hz) frequency. The sound pressure level (in decibels [dB]) of a pure tone of 1,000 Hz frequency that is as loud (audially) as the tone being measured is called the loudness level of the given sound (in phons). Loudness for complex sounds is rated on an arbitrary scale in sones. Loudness is an important characteristic of musical sound.

loudness

The intensive attribute of an auditory sensation, in terms of which sounds may be rank-ordered on a scale extending from soft to loud; depends primarily on sound pressure, but also on the frequency and wave form of the sound stimulus; expressed in units called sones; 2 sones is just twice as loud as 1 sone.

Loudness

boiler factory
proverbial source of noise and confusion. [Am. Culture: Misc.]
breaking of the sound barrier
boom of plane heard exceeding speed of about 750 m.p.h. or Mach 1. [Aviation: Misc.]
Concorde
supersonic jet of British-French design. [Eur. Hist.: EB, III: 66]
Joshua
Jericho walls razed by clamorous blasts from his troops’ trumpets. [O.T.: Joshua 6]
Krakatoa
volcanic explosion on this Indonesian island heard 3000 miles away (1883). [Asian Hist.: NCE, 1500]
Olivant
Roland’s horn, whose blast kills birds and is heard by Charlemagne, eight miles away. [Fr. Legend: Brewer Dictionary, 772]
sonic boom
shock wave from plane breaking the speed of sound. [Aviation: Misc.]
Stentor
Greek herald with voice of 50 men. [Gk. Myth.: Espy, 39]
References in periodicals archive ?
We want to ensure that what we broadcast is appealing to all our viewers, and by installing loudness control we can ease the pain of having to adjust the volume between broadcasters or channel content.
It can be easily observed that the kurtosis, total loudness, spectral centroid and sharpness of the noise increase gradually as the gear tooth wear increases.
Loudness per se will not transform Egypt into a developed country; on the contrary, it is distracting the entire society from thinking clearly.
We did find a significant statistical relationship between changes in loudness as determined by the TET and changes reflected in the tinnitus self-assessment scores (p = 0.
A decrease in tinnitus loudness was considered as objective improvement.
Advertising agencies say that the irritating hike in the volume is unintentional and due to the subjective loudness meter of the audience.
Using intuitive overlay controls within its Web-based interface, Observer provides continuous measurements identifying programme loudness and true-peak signal levels for instant verification for review or export.
Dolby will also soon make its dialogue gating technology available to manufacturers at no charge, and introduced licensing programs for its suite of loudness metering and correction technologies, the company said in a statement.
Flask takes Prochnik to other circles of this inferno and explains that loudness isn't simply about sex.
The loudness level of the signal is an important link to annoyance, but when comparing signals of equal loudness or perhaps over long-term exposures, spectral qualities such as rumble become more significant.
Okamota's (2009) National Science Foundation research, "Listening to tailor-made notched music reduces tinnitus loudness and tinnitus-related auditory cortex activity.
Washington, Jan 19 (ANI): A new Canadian study suggests that kids with cochlear implants in both ears may face difficulty controlling the loudness and pitch of their voices.