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Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...
Elevated workplace or environmental noise can cause hearing impairment, tinnitus, hypertension, ischemic heart disease, annoyance, and sleep disturbance. [3] [4] Changes in the immune system and birth defects have been also attributed to noise exposure. [5] Although age-related health effects ( presbycusis) occur naturally with age, [6] in many ...
The microwave auditory effect, also known as the microwave hearing effect or the Frey effect, consists of the human perception of sounds induced by pulsed or modulated radio frequencies. The perceived sounds are generated directly inside the human head without the need of any receiving electronic device. The effect was first reported by persons ...
Noise pollution, or sound pollution, is the propagation of noise or sound with ranging impacts on the activity of human or animal life, most of which are harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport and propagation systems. [1] [2] [3] Poor urban planning may give rise to noise ...
Cognitive shuffling is also similar to yoga nidra, which is the practice of mentally scanning the body by slowly bringing awareness to each part. Yoga nidra may improve sleep because it calms the ...
For example, staying well hydrated and getting enough sleep can help alleviate tinnitus symptom severity both during the day and at night. Taking in good nutrition and reducing caffeine and ...
The bleep censor is a software module, manually operated by a broadcast technician. [2] A bleep is sometimes accompanied by a digital blur pixelization or box over the speaker's mouth in cases where the removed speech may still be easily understood or not understood by lip reading. [3]
Noise music. Noise music is a genre of music that is characterised by the expressive use of noise. This type of music tends to challenge the distinction that is made in conventional musical practices between musical and non-musical sound. [4] Noise music includes a wide range of musical styles and sound-based creative practices that feature ...