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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 ...
An outdoor bug zapper. A bug zapper, more formally called an electrical discharge insect control system, electric insect killer or (insect) electrocutor trap, is a device that attracts and kills flying insects that are attracted by light. A light source attracts insects to an electrical grid, where they are electrocuted by touching two wires ...
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 ...
Dolby 361 A-type noise reduction module. In music, " noise " has been variously described as unpitched, indeterminate, uncontrolled, convoluted, unmelodic, loud, otherwise unmusical, or unwanted sound, or simply as sound in general. The exact definition is often a matter of both cultural norms and personal tastes.
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 ...
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 ...
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]
From gorgeous designer to under-the-radar finds, we found 14 stunning wedding guest dresses on Amazon that will work for every stage of pregnancy—and beyond. While a few of these are true ...