WordNet
- (computer science) the area of the screen in graphical user interfaces against which icons and windows appear (同)desktop, screen background
- a persons social heritage: previous experience or training; "he is a lawyer with a sports background"
- understate the importance or quality of; "he played down his royal ancestry" (同)play down, downplay
- information that is essential to understanding a situation or problem; "the embassy filled him in on the background of the incident" (同)background knowledge
- extraneous signals that can be confused with the phenomenon to be observed or measured; "they got a bad connection and could hardly hear one another over the background signals" (同)background signal
- the part of a scene (or picture) that lies behind objects in the foreground; "he posed her against a background of rolling hills" (同)ground
- relatively unimportant or inconspicuous accompanying situation; "when the rain came he could hear the sound of thunder in the background"
- incomprehensibility resulting from irrelevant information or meaningless facts or remarks; "all the noise in his speech concealed the fact that he didnt have anything to say"
- the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience; "modern music is just noise to me" (同)dissonance, racket
- electrical or acoustic activity that can disturb communication (同)interference, disturbance
- a loud outcry of protest or complaint; "the announcement of the election recount caused a lot of noise"; "whatever it was he didnt like it and he was going to let them know by making as loud a noise as he could"
- sound of any kind (especially unintelligible or dissonant sound); "he enjoyed the street noises"; "they heard indistinct noises of people talking"; "during the firework display that ended the gala the noise reached 98 decibels"
PrepTutorEJDIC
- (景色・絵などの)『背景』,遠景 / (模様などの)地 / (事件などの)背景 / (人の)経歴,前歴
- 〈C〉〈U〉(特に,大きなまたは不快な)『音』,物音 / 〈C〉〈U〉(街・往来などの)『ざわめき』,騒音,騒々しい声 / 〈C〉(一般に)物音 / 〈U〉(ラジオ・テレビなどの)ノイズ,雑音 / …‘を'広める,言い触らす《+『名』+『about』(『abroad, around』)》 / 音を立てる;大声で話す《+『about』(『around, abroad』)》
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2012/11/27 16:50:23」(JST)
[Wiki en表示]
In acoustics and specifically in acoustical engineering, background noise or ambient noise is any sound other than the sound being monitored(primary sound). Background noise is a form of noise pollution or interference. Background noise is an important concept in setting noise regulations. See noise criteria for cinema/home cinema applications.
Examples of background noises are environmental noises such as waves, traffic noise, alarms, people talking, bioacoustic noise from animals or birds and mechanical noise from devices such as refrigerators or air conditioning, power supplies or motors.
The prevention or reduction of background noise is important in the field of active noise control. It is an important consideration with the use of ultrasound (e.g. for medical diagnosis or imaging), sonar and sound reproduction.
In astronomy, background noise or cosmic background radiation is electromagnetic radiation from the sky with no discernible source.
In information architecture, irrelevant, duplicate or incorrect information may be called background noise.
In physics and telecommunication, background signal noise can be detrimental or in some cases beneficial. The study of avoiding, reducing or using signal noise is information theory.
In telephony, artificial comfort noise is used as a substitute for natural background noise, to fill in artificial silence created by discontinuous transmission systems using voice activity detection. Background noise can also affect concentration.
See also
- Ambient noise level
- 4'33"
- Electronic noise
External links
- How low noise levels are achieved in concert halls
UpToDate Contents
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English Journal
- Size of cortical generators of epileptic interictal events and visibility on scalp EEG.
- von Ellenrieder N1, Beltrachini L2, Perucca P3, Gotman J3.
- NeuroImage.Neuroimage.2014 Jul;94:47-54. doi: 10.1016/j.neuroimage.2014.02.032. Epub 2014 Mar 14.
- Growing evidence indicates that fast oscillations (>80Hz) can be recorded interictally in the scalp EEG of patients with epilepsy, and that they may point to the seizure-onset zone. However, mechanisms underpinning the emergence of scalp fast oscillations, and whether they differ from those of in
- PMID 24636878
- Range verification for eye proton therapy based on proton-induced x-ray emissions from implanted metal markers.
- Rosa VL1, Kacperek A, Royle G, Gibson A.
- Physics in medicine and biology.Phys Med Biol.2014 Jun 7;59(11):2623-38. doi: 10.1088/0031-9155/59/11/2623. Epub 2014 May 1.
- Metal fiducial markers are often implanted on the back of the eye before proton therapy to improve target localization and reduce patient setup errors. We aim to detect characteristic x-ray emissions from metal targets during proton therapy to verify the treatment range accuracy. Initially gold was
- PMID 24786372
- White-throated sparrows alter songs differentially in response to chorusing anurans and other background noise.
- Lenske AK1, La VT2.
- Behavioural processes.Behav Processes.2014 Jun;105:28-35. doi: 10.1016/j.beproc.2014.02.015. Epub 2014 Mar 4.
- Animals can use acoustic signals to attract mates and defend territories. As a consequence, background noise that interferes with signal transmission has the potential to reduce fitness, especially in birds that rely on song. While much research on bird song has investigated vocal flexibility in res
- PMID 24607392
Japanese Journal
- 文字認識のための画像の表面情報を用いた裏写りと地色の除去 (制御研究会 制御工学分野における信号処理技術,および制御・信号処理一般)
- 野本 佳織,田邉 造,長保 龍 [他]
- 電気学会研究会資料. CT 2015(96-104・107-115), 93-98, 2015-08-31
- NAID 40020572877
- Improvement of infrared near-field spectrum by asymmetric interferometer configuration
- Ikemoto Yuka,Okamura Hidekazu,Moriwaki Taro,Suto Hitoshi,Kinoshita Toyohiko
- Jpn. J. Appl. Phys. 54(8), 082402, 2015-07-10
- … The signal-to-noise ratio has been improved 6-fold and the signal-to-background ratio is improved 8-fold compared with those observed in the previous system. …
- NAID 150000111146
- Considerations on nonlinearity measurement with high signal-to-noise ratio for RF surface and bulk acoustic wave devices
- Kodaira Ryosuke,Omori Tatsuya,Hashimoto Ken-ya,Kyoya Haruki,Nakagawa Ryo
- Jpn. J. Appl. Phys. 54(7S1), 07HD14, 2015-06-22
- … This paper discusses the measurement setup of non-linearity caused in radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) devices with high signal-to-noise ratio (SNR). … It is shown that when some important points are considered, the background level can be suppressed better than −135 dBm, and the non-linearity signals can be measured in high SNR. …
- NAID 150000110920
Related Links
- In acoustics and specifically in acoustical engineering, background noise or ambient noise is any sound other than the sound being monitored(primary sound ). Background noise is a form of noise pollution or interference. Background noise is ...
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