|
Chalkboard Scraping
Scraping a chalkboard (also known as a blackboard) with one's fingernails produces a sound and feeling which most people find extremely irritating. The basis of the innate reaction to the sound has been studied in the field of psychoacoustics (the branch of psychology concerned with the perception of sound and its physiological effects). Physiological response Brain stem reflex In response to audio stimuli, the mind's way of interpreting sound can be translated through a regulatory process called the reticular activating system. Located in the brain stem, the reticular activating system continually listens, even throughout delta-wave sleep, to determine the importance of sounds in relation to waking the cortex or the rest of the body from sleep. Chalkboard scraping, or noises that elicit an emotional response have been known to trigger tendencies from the fight or flight response which acts as the body's primary self-defense mechanism. Emotional response Distinct emotion A stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalkboard
A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, better known as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone. Design A blackboard can simply be a board painted with a dark matte (surface), matte paint (usually black, occasionally dark green). Matte black plastic sign material (known as closed-cell PVC foamboard) is also used to create custom chalkboard art. Blackboards on an A-frame are used by restaurants and bars to advertise daily specials. Adhesive chalkboard surface is also available in stores as rolls of textured black plastic shelf covering, which is applied to the desired wall, door or other surface. A more modern variation consists of a coiled sheet of plastic drawn across two parallel rollers, which can be scrolled to create additional writing space while saving what has been written. The highest grade blackboards ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garden Fork
A garden fork, spading fork, or digging fork (in the past also an ''asparagus fork'', the same name as a very different utensil) is a gardening implement, with a handle and a square-shouldered head featuring several (usually four) short, sturdy tines. It is used for loosening, lifting and turning over soil in gardening and farming, and not to be confused with the pitchfork, a similar tined tool used for moving (or throwing) loose materials such as hay, straw, silage, and manure. Uses A garden fork is used similarly to a spade in loosening and turning over soil. Its tines allow it to be pushed more easily into the ground, and it can rake out stones and weeds and break up clods, it is not so easily stopped by stones, and it does not cut through weed roots or root-crops. Garden forks were originally made of wood, but the majority are now made of forged carbon steel or stainless steel. Types Reflecting their differing uses, garden forks have shorter, flatter, thicker, and more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Misophonia
Misophonia (or selective sound sensitivity syndrome) is a disorder of decreased Distress tolerance, tolerance to specific sounds or their associated Stimulus (psychology), stimuli, or cues. These cues, known as "triggers", are experienced as Distress (medicine), unpleasant or distressing and tend to evoke strong negative emotional, physiological, and behavioral responses not seen in most other people. Misophonia and the behaviors that people with misophonia often use to cope with it (such as experiential avoidance, avoidance of "triggering" situations or using hearing protection) can adversely affect the ability to achieve life goals, communicate effectively, and enjoy social situations. Originating within the field of audiology in 2001, the condition remained largely undescribed in the clinical and research literature until 2013, when a group of psychiatrists at Amsterdam University Medical Center published a detailed misophonia case series and proposed the condition as a "new ps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalkboard Paint
Chalkboard paint is a specialized paint that creates a chalkboard-like coating that can be utilized as a writing surface in the same manner as a traditional chalkboard. Chalkboard paint is commonly made out of a mixture of talc, acrylic, water, glycol, titanium dioxide, carbon black, opacifiers, silica, and esters. It may also contain acetone, propane, butane, xylene, ethylbenzene, amorphous silica, n-butyl acetate, and propylene glycol methyl ether acetate which are industrial standard ingredients used in inks and paints as thinners, olfactory, and pigment A pigment is a powder used to add or alter color or change visual appearance. Pigments are completely or nearly solubility, insoluble and reactivity (chemistry), chemically unreactive in water or another medium; in contrast, dyes are colored sub ...ation agents. References {{reflist Paints Writing media ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equal-loudness Contour
An equal-loudness contour is a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. The unit of measurement for loudness levels is the phon and is arrived at by reference to equal-loudness contours. By definition, two sine waves of differing frequencies are said to have equal-loudness level measured in phons if they are perceived as equally loud by the average young person without significant hearing impairment. The Fletcher–Munson curves are one of many sets of equal-loudness contours for the human ear, determined experimentally by Harvey Fletcher and Wilden A. Munson, and reported in a 1933 paper entitled "Loudness, its definition, measurement and calculation" in the ''Journal of the Acoustical Society of America''. Fletcher–Munson curves have been superseded and incorporated into newer standards. The definitive curves are those defined in ISO 226 from the International O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ear Canal
The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the auricle to the eardrum and is about in length and in diameter. Structure The human ear canal is divided into two parts. The elastic cartilage part forms the outer third of the canal; its anterior and lower wall are cartilaginous, whereas its superior and back wall are fibrous. The cartilage is the continuation of the cartilage framework of auricle. The cartilaginous portion of the ear canal contains small hairs and specialized sweat glands, called apocrine glands, which produce cerumen ( ear wax). The bony part forms the inner two thirds. The bony part is much shorter in children and is only a ring (''annulus tympanicus'') in the newborn. The layer of epithelium encompassing the bony portion of the ear canal is much thinner and therefore, more sensitive in comparison to the cartilaginous portion. Size ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acoustic Resonance
Acoustic resonance is a phenomenon in which an acoustics, acoustic system amplifies sound waves whose frequency matches one of its own natural frequencies of vibration (its ''resonance frequencies''). The term "acoustic resonance" is sometimes used to narrow mechanical resonance to the frequency range of human hearing, but since acoustics is defined in general terms concerning vibrational waves in matter, acoustic resonance can occur at frequencies outside the range of human hearing. An acoustically resonant object usually has more than one resonance frequency, especially at harmonics of the strongest resonance. It will easily vibrate at those frequencies, and vibrate less strongly at other frequencies. It will "pick out" its resonance frequency from a complex excitation, such as an impulse or a wideband noise excitation. In effect, it is filtering out all frequencies other than its resonance. Acoustic resonance is an important consideration for instrument builders, as most a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of The Acoustical Society Of America
The ''Journal of the Acoustical Society of America'' (JASA) is a monthly peer-reviewed scientific journal covering all aspects of acoustics. It is published by the Acoustical Society of America. The editor-in-chief is James F. Lynch (Woods Hole Oceanographic Institution). ''JASA'' contains news items, book reviews, references to contemporary papers, reviews of acoustical patents, and standards news. According to the ''Journal Citation Reports'', the journal has a 2023 impact factor of 2.1. History In 1929, the newly formed Acoustical Society of America Publication Committee began investigating how to start a journal. The first issue of the ''Journal of the Acoustical Society of America'' (JASA) was published in October 1929 and contained 8 papers. The cover featured the 1929 logo designed by Wallace Waterfall. In May 1932, publication of JASA was transferred to the American Institute of Physics (AIP). In 1957 the publication frequency of the journal went from bimonthly to m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christoph Reuter
Christoph Reuter (born 28 November 1968) is a German University professor for systematic musicology at the University of Vienna. life Born in Duisburg, Reuter studied musicology at the University of Cologne, received his doctorate ''summa cum laude'' in 1996 and his habilitation in 2002. He has held guest professorships or teaching positions at several universities (University of Vienna, Hochschule für Musik Franz Liszt, Weimar), and has also been a managing partner of a Cologne-based internet agency since 2000. Since 2008, Reuter has been university professor for systematic musicology at the University of Vienna. Scientific activity His research interests include musical acoustics, music physiology and psychological aspects of music perception as well as music-related internet/software projects. Examples of his manifold studies in the field of systematic musicology are investigations on ''sound colour perception'', on the ''Variophon'', on ''music automatons'', on ''percep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Musicology
Musicology is the academic, research-based study of music, as opposed to musical composition or performance. Musicology research combines and intersects with many fields, including psychology, sociology, acoustics, neurology, natural sciences, formal sciences and computer science. Musicology is traditionally divided into three branches: music history, systematic musicology, and ethnomusicology. Historical musicologists study the history of musical traditions, the origins of works, and the biographies of composers. Ethnomusicologists draw from anthropology (particularly field research) to understand how and why people make music. Systematic musicology includes music theory, aesthetics, pedagogy, musical acoustics, the science and technology of musical instruments, and the musical implications of physiology, psychology, sociology, philosophy and computing. Cognitive musicology is the set of phenomena surrounding the cognitive modeling of music. When musicologists carry out ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Applied Acoustics
''Applied Acoustics'' (French: ''Acoustique Appliquée'', German: ''Angewandte Akustik'') is a bimonthly peer-reviewed scientific journal. It was established in 1968 by Elsevier, which continues to publish the journal bimonthly. This journal covers research and applications in all aspects of acoustics. The editor in chief is Shiu Keung Tang (University of Hull). According to the ''Journal Citation Reports'', the journal has a 2022 impact factor of 3.4. Abstracting and indexing This journal is indexed by the following services: *Science Citation Index *Current Contents/ Engineering, Computing & Technology *Academic Onefile *Applied Mechanics Reviews *CSA (database company) *Ei Compendex *EBSCO Information Services *GeoRef *INSPEC *Scopus Scopus is a scientific abstract and citation database, launched by the academic publisher Elsevier as a competitor to older Web of Science in 2004. The ensuing competition between the two databases has been characterized as "intense" and is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ig Nobel Prize
The Ig Nobel Prize () is a satirical prize awarded annually since 1991 to promote public engagement with scientific research. Its aim is to "honor achievements that first make people laugh, and then make them think." The name of the award is a pun on the Nobel Prize, which it parodies, and on the word "ignoble". Organized by the scientific humor magazine '' Annals of Improbable Research'' (AIR), the Ig Nobel Prizes are presented by Nobel laureates in a ceremony at the Massachusetts Institute of Technology. The winners also deliver public lectures. The Ig Nobel Prize monetary award is given in a solitary banknote for the amount of 10 trillion Zimbabwean dollars ($0.40 USD, but the banknote is worth more as a collector's item). History The Ig Nobels were created in 1991 by Marc Abrahams, then editor-in-chief of the '' Journal of Irreproducible Results'' and later co-founder of the '' Annals of Improbable Research'', who has been the master of ceremonies at all awards ceremon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
