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Richard H. Small
Richard H. Small (born 1935) is an American scientist, who has worked mainly in the field of electroacoustics. He is known for the commonly used Thiele/Small parameters for loudspeaker enclosure design, which are named after Small and his colleague Neville Thiele. Early life Small was born in San Diego, California. His father was an amateur pianist. Having a keen interest in electronics he built the amplifiers to drive the speakers in his parents house. His father built various enclosures for the loudspeakers, following the trends of the times. He earned a Bachelor of Science degree from the California Institute of Technology in 1956 and a Master of Science degree in electrical engineering from the Massachusetts Institute of Technology in 1958. Career He gained experience in electronic circuit design for high-performance analytical instruments at the Bell & Howell Research Center in California from 1958 to 1964. During this period, he took a one-year visiting fellowship at the Nor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electroacoustics
Acoustical engineering (also known as acoustic engineering) is the branch of engineering dealing with sound and vibration. It includes the application of acoustics, the science of sound and vibration, in technology. Acoustical engineers are typically concerned with the design, analysis and control of sound. One goal of acoustical engineering can be the reduction of unwanted noise, which is referred to as noise control. Unwanted noise can have significant impacts on animal and human health and well-being, reduce attainment by students in schools, and cause hearing loss. Noise control principles are implemented into technology and design in a variety of ways, including control by redesigning sound sources, the design of noise barriers, sound absorbers, suppressors, and buffer zones, and the use of hearing protection (earmuffs or earplugs). Besides noise control, acoustical engineering also covers positive uses of sound, such as the use of ultrasound in medicine, programming digit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thiele/Small
Thiele/Small parameters (commonly abbreviated T/S parameters, or TSP) are a set of electromechanical parameters that define the specified low frequency performance of a loudspeaker driver. These parameters are published in specification sheets by driver manufacturers so that designers have a guide in selecting off-the-shelf drivers for loudspeaker designs. Using these parameters, a loudspeaker designer may simulate the position, velocity and acceleration of the diaphragm, the input impedance and the sound output of a system comprising a loudspeaker and enclosure. Many of the parameters are strictly defined only at the resonant frequency, but the approach is generally applicable in the frequency range where the diaphragm motion is largely pistonic, i.e. when the entire cone moves in and out as a unit without cone breakup. Rather than purchase off-the-shelf components, loudspeaker design engineers often define desired performance and work backwards to a set of parameters and manufactu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neville Thiele
Albert Neville Thiele, OAM (4 December 1920 – 1 October 2012), was an Australian audio engineer. Thiele was born in Brisbane, Australia. He was particularly noted for his work on electronic filters and on developing the Thiele/Small parameters for characterising loudspeakers as an aid to loudspeaker cabinet design. Early life and education Thiele was educated at Milton State School, Brisbane Grammar School and the Universities of Queensland and Sydney. After performing on Brisbane radio stations as a boy soprano in the early 1930s, and later as an actor, he became interested in the reproduction and transmission of sound. After five years of war service in infantry and the Australian Electrical and Mechanical Engineers (AEME, subsequently Royal Australian Electrical and Mechanical Engineers) in New Guinea and Bougainville, he graduated with a Bachelor of Engineering (Mechanical and Electrical) in 1952. Career Joining EMI (Australia) Ltd., Thiele was employed as a des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Diego
San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States and the seat of San Diego County, the fifth most populous county in the United States, with 3,338,330 estimated residents as of 2019. The city is known for its mild year-round climate, natural deep-water harbor, extensive beaches and parks, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center. San Diego is the second largest city in the state of California, after Los Angeles. Historically home to the Kumeyaay people, San Diego is frequently referred to as the "Birthplace of California", as it was the first site visited and settled by Europeans on what is now the U.S. west coast. Upon landing in San Diego Bay in 1542, Juan Rodríguez Cabrillo claimed the area for Spain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the most populated subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles area and the San Francisco Bay Area are the nation's second and fifth most populous urban regions respectively, with the former having more than 18.7million residents and the latter having over 9.6million. Sacramento is the state's capital, while Los Angeles is the most populous city in the state and the second most populous city in the country. San Francisco is the second most densely populated major city in the country. Los Angeles County is the country's most populous, while San Bernardino County is the largest county by area in the country. California borders Oregon to the north, Nevada and Arizona to the ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Institute Of Technology
The California Institute of Technology (branded as Caltech or CIT)The university itself only spells its short form as "Caltech"; the institution considers other spellings such a"Cal Tech" and "CalTech" incorrect. The institute is also occasionally referred to as "CIT", most notably in its alma mater, but this is uncommon. is a private university, private research university in Pasadena, California. Caltech is ranked among the best and most selective academic institutions in the world, and with an enrollment of approximately 2400 students (acceptance rate of only 5.7%), it is one of the world's most selective universities. The university is known for its strength in science and engineering, and is among a small group of Institute of Technology (United States), institutes of technology in the United States which is primarily devoted to the instruction of pure and applied sciences. The institution was founded as a preparatory and vocational school by Amos G. Throop in 1891 and began ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massachusetts Institute Of Technology
The Massachusetts Institute of Technology (MIT) is a Private university, private Land-grant university, land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the most prestigious and highly ranked academic institutions in the world. Founded in response to the increasing Technological and industrial history of the United States, industrialization of the United States, MIT adopted a European History of European universities, polytechnic university model and stressed laboratory instruction in applied science and engineering. MIT is one of three private land grant universities in the United States, the others being Cornell University and Tuskegee University. The institute has an Campus of the Massachusetts Institute of Technology, urban campus that extends more than a mile (1.6 km) alongside the Charles River, and encompasses a number of major off-campus fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell & Howell
Bell and Howell LLC is a U.S.-based services organization and former manufacturer of cameras, lenses, and motion picture machinery, founded in 1907 by two projectionists, and originally headquartered in Wheeling, Illinois. The company is now headquartered in Durham, North Carolina, and currently sells production mail equipment, buy-online-pickup-in-store (BOPIS) smart locker and kiosk solutions, and provides maintenance services for automated, industrial equipment in enterprise-level companies. Since 2010, the Bell + Howell brand name has been extensively licensed for a diverse range of consumer electronics products. History According to its charter, the Bell & Howell Company was incorporated on February 17, 1907. It was duly recorded in the Cook County Record Book eight days later. The first meeting of stockholders took place in the office of Attorney W. G. Strong on February 19 at 10 a.m. (10:00 CT). The first board of directors was chosen for a term of one year: Donal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Sydney
The University of Sydney (USYD), also known as Sydney University, or informally Sydney Uni, is a public university, public research university located in Sydney, Australia. Founded in 1850, it is the oldest university in Australia and is one of the country's six sandstone universities. The university comprises eight academic faculties and university schools, through which it offers bachelor, master and doctoral degrees. The university consistently ranks highly both nationally and internationally. QS World University Rankings ranked the university top 40 in the world. The university is also ranked first in Australia and fourth in the world for QS graduate employability. It is one of the first universities in the world to admit students solely on academic merit, and opened their doors to women on the same basis as men. Five Nobel Prize, Nobel and two Crafoord Prize, Crafoord laureates have been affiliated with the university as graduates and faculty. The university has educated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KEF (manufacturer) , a form of cannabis
{{disambiguation, geo ...
Kef may refer to: Places *El Kef (also transliterated as ''Al-Kāf'' or ''Le Kef''), a city in northwestern Tunisia *Kef Governorate, Tunisia Others *''Aram Bajakian's Kef'', a 2011 album by guitarist Aram Bajakian * ISO 639:kef or Ewe language of southeastern Ghana *Kef Kalesi, a castle near Adilcevaz, Turkey *A letter in a fictional alphabet in John Norman's Gor novels * Keflavík International Airport See also *KEF (other) *Kief Kief (from Moroccan Arabic كيف ''kīf'', "Joy, pleasure"), sometimes transliterated as keef, also known as ‘’Dust’’ and "Chief" a.k.a cannabis crystals among other names, refers to the pure and clean collection of loose cannabis trich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maidstone
Maidstone is the largest Town status in the United Kingdom, town in Kent, England, of which it is the county town. Maidstone is historically important and lies 32 miles (51 km) east-south-east of London. The River Medway runs through the centre of the town, linking it with Rochester, Kent, Rochester and the Thames Estuary. Historically, the river carried much of the town's trade as the centre of the agricultural county of Kent, known as the Garden of England. There is evidence of settlement in the area dating back before the Stone Age. The town, part of the borough of Maidstone, had an approximate population of 100,000 in 2019. Since World War II, the town's economy has shifted from heavy industry towards light industry and services. Toponymy Anglo-Saxon period of English history, Saxon charters dating back to ca. 975 show the first recorded instances of the town's name, ''de maeides stana'' and ''maegdan stane'', possibly meaning ''stone of the maidens'' or ''stone of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
England
England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain, which lies in the North Atlantic, and includes over 100 smaller islands, such as the Isles of Scilly and the Isle of Wight. The area now called England was first inhabited by modern humans during the Upper Paleolithic period, but takes its name from the Angles, a Germanic tribe deriving its name from the Anglia peninsula, who settled during the 5th and 6th centuries. England became a unified state in the 10th century and has had a significant cultural and legal impact on the wider world since the Age of Discovery, which began during the 15th century. The English language, the Anglican Church, and Eng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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