James West | |
---|---|
Born | |
Alma mater | Hampton University, Temple University |
Awards | ASA Gold Medal (2006) National Medal of Technology and Innovation (2006) John Scott Medal (2018) |
Scientific career | |
Fields | Physics, Electrical Engineering |
Institutions | Bell Labs Johns Hopkins University |
James Edward Maceo West (born February 10, 1931) is an American inventor and acoustician. He holds over 250 foreign and U.S. patents for the production and design of microphones and techniques for creating polymer foil electrets.
West was born on February 10, 1931, in Farmville, Prince Edward County, Virginia as the elder of two children to Samuel Edward and Matilda West. He was born in his maternal grandfather's house because the local hospital would not admit Black people. His father worked at various points as a funeral home owner, an insurance salesman, and as a Pullman porter on the Baltimore and Ohio Railroad. His mother was a schoolteacher who worked at Langley Air Force Base during World War II; she later lost her job due to her involvement in the NAACP and became one of the "Hidden Figures" (Black astrophysicists who worked for NASA at Langley Research Center and received little to no credit for their work). His maternal grandmother, who was formerly enslaved, was a major influence on him; she raised him while his mother was away teaching at a Native American reservation in Pennsylvania. He became interested in electricity at twelve years old after taking a job installing electrical wiring in homes in rural Virginia with his cousin. [1] [2] [3] [4]
After attending school in Farmville, his parents moved him to Phenix High School in Hampton, Virginia for better opportunities. After graduating high school, he attended Hampton University on a pre-medical track before being drafted into the U.S. Army in the Korean War, where he received a Purple Heart after being wounded there. Later, he attended Temple University to study physics. Initially, West was excluded from study groups due to his race but was soon invited after he was able to solve even the most complex group problems on his own. [2] [3] [4] [5]
As a graduate student, he interned with Bell Laboratories where he began designing work on the Electret microphone. He completed bachelor's and master's coursework in physics at Temple University by 1957 but did not officially graduate because he returned to Bell Laboratories to continue his work on the microphone in November of that year. [3] [4]
In 2001, West retired from Lucent Technologies after a distinguished 40-year career at Bell Laboratories where he received the organization's highest honor, being named a Bell Laboratories Fellow. West then joined the faculty of the Whiting School at Johns Hopkins University where he is a professor in the Department of Electrical and Computer Engineering. In 2007, West received an honorary doctorate from NJIT. [3] [4] [6]
He has four children with his wife Marlene. [2]
Along with Gerhard Sessler, West invented the foil electret microphone in 1962 while developing instruments for human hearing research. [7] [8] Compared to the previous condenser microphones, the electret microphone has higher capacitance and does not require a DC bias. [9] West and Sessler optimized the mechanical and surface parameters of the system. [10] Nearly 90 percent of the microphones produced annually are based on the principles of the foil-electret and are used in everyday items such as telephones, camcorders, hearing aids, baby monitors, and audio recording devices among others. [11]
West measured the acoustics of Philharmonic Hall in New York City. [12]
In a study published in 2005, West teamed with Ilene Busch-Vishniac and studied the acoustic environment of hospitals showing that hospitals are in general too loud and that the noise levels affect staff and patients. [13]
At Johns Hopkins, he has worked on a device to detect pneumonia in lungs of young children. [14] His research at Johns Hopkins also includes efforts to improve teleconferencing technology by transmitting stereophonic sound over the Internet and new transducers. [15]
Throughout his career, West has been a fervent advocate for greater diversity in the fields of science and technology. [16] While at Bell Laboratories, West co-founded the Association of Black Laboratory Employees (ABLE), an organization formed to "address placement and promotional concerns of Black Bell Laboratories employees." [17] He was also instrumental in the creation and development of both the Corporate Research Fellowship Program (CRFP) for graduate students pursuing terminal degrees in the sciences, as well as the Summer Research Program, which together provided opportunities for over 500 non-white graduate students. [7] [18] Since 2015, West has served on the board of directors of the Ingenuity Project, a Baltimore non-profit that supports talented middle and high school students in science and math. [19] West has long been known for being a mentor to students, and for being active in initiating and participating in programs aimed at encouraging more minorities and women to enter the fields of science, technology, mathematics, and engineering (STEM). [20]
West is the recipient of the National Medal of Technology and Innovation, [21] and in 2010, along with Gerhard M. Sessler, West was the recipient of The Franklin Institute's Benjamin Franklin Medal in Electrical Engineering. He was elected a member of the National Academy of Engineering in 1998 for "electret transducers and their applications to microphones" [22] [23] and was also inducted into the National Inventors Hall of Fame in 1999. [24] and He is also the recipient of numerous other honors and awards such as the Silver Medal in Engineering Acoustics from the Acoustical Society of America. [1]
Sound Transmission Class is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used. The STC rating very roughly reflects the decibel reduction of noise that a partition can provide. The STC is useful for evaluating annoyance due to speech sounds, but not music or machinery noise as these sources contain more low frequency energy than speech.
Gerhard M. Sessler is a German inventor and scientist. He is Professor emeritus at the Department of Electrical Engineering and Information Technology of the Technische Universität Darmstadt.
Whitlow W. L. Au was a leading expert in bioacoustics specializing in biosonar of odontocetes. He is author of the widely known book The Sonar of Dolphins (1993) and, with Mardi Hastings, Principles of Marine Bioacoustics (2008). Au was honored as a Fellow of the Acoustical Society of America in 1990 and awarded the ASA's first Silver Medal in Animal Bioacoustics in 1998. He was graduate advisor to MacArthur Fellow Kelly Benoit-Bird, who credits Au for discovering how sophisticated dolphin sonar is, developing dolphin-inspired machine sonars to separate different species of fish with the goal of protecting sensitive species, and for making numerous contributions to the description of Humpback whale song, which helped protect these whales from ship noise and ship traffic.
An electret microphone is a microphone whose diaphragm forms a capacitor that incorporates an electret. The electret's permanent electric dipole provides a constant charge Q on the capacitor. Sound waves move the diaphragm, changing the capacitance C, which produces a corresponding voltage change across the capacitor of ΔV = Q/ΔC. The electret's constant charge eliminates the need for the polarizing power supply required for non-electret condenser microphones, though a preamplifier is typically incorporated to boost the audio voltage signal.
James Loton Flanagan was an American electrical engineer. He was Rutgers University's vice president for research until 2004. He was also director of Rutgers' Center for Advanced Information Processing and the Board of Governors Professor of Electrical and Computer Engineering. He is known for co-developing adaptive differential pulse-code modulation (ADPCM) with P. Cummiskey and Nikil Jayant at Bell Labs.
Diffusion, in architectural acoustics, is the spreading of sound energy evenly in a given environment. A perfectly diffusive sound space is one in which the reverberation time is the same at any listening position. Most interior spaces are non-diffusive; the reverberation time is considerably different around the room. At low frequencies, they suffer from prominent resonances called room modes.
A ferroelectret, also known as a piezoelectret, is a thin film of polymer foams, exhibiting piezoelectric and pyroelectric properties after electric charging. Ferroelectret foams usually consist of a cellular polymer structure filled with air. Polymer-air composites are elastically soft due to their high air content as well as due to the size and shape of the polymer walls. Their elastically soft composite structure is one essential key for the working principle of ferroelectrets, besides the permanent trapping of electric charges inside the polymer voids. The elastic properties allow large deformations of the electrically charged voids. However, the composite structure can also possibly limit the stability and consequently the range of applications.
Peter Westervelt was an American physicist, noted for his work in nonlinear acoustics, and Professor Emeritus of Physics at Brown University.
Dr Harry Ferdinand Olson, E.E., Ph.D. was a prominent engineer and inventor with RCA Victor, the Acoustic Research Director of RCA Laboratories, Princeton, and a pioneer in the field of 20th century acoustical engineering notably in the fields of high-fidelity, digital music synthesis, microphones, loudspeakers, acoustics, radar, submarine communication, magnetic tape and noise reduction.
The ASA Silver Medal is an award presented by the Acoustical Society of America to individuals, without age limitation, for contributions to the advancement of science, engineering, or human welfare through the application of acoustic principles or through research accomplishments in acoustics. The medal is awarded in a number of categories depending on the technical committee responsible for making the nomination.
Hugh S. Knowles was an American acoustical engineer, inventor, and manufacturer in the hearing aids field. He was the holder of more than 50 patents in acoustics and related fields.
Andrea Prosperetti is the Distinguished Professor of Mechanical Engineering at the University of Houston, the Berkhoff Professor of Applied Physics at the University of Twente in the Netherlands and an elected member of the National Academy of Engineering in 2012. He is known for his work in the field of multiphase flows including bubble dynamics and cavitation.
Ilene Busch-Vishniac is an American-born mechanical engineer and university administrator. She served as Dean of the Whiting School of Engineering at Johns Hopkins University from 1998 to 2003 then resigned the position to serve as President of the Acoustical Society of America (ASA), an elected non-gratis position, from 2003 to 2005. She served as Provost and Vice-President for Academic Affairs at McMaster University from 2007 to 2012, and as President of the University of Saskatchewan from 2012 to 2014. In 2018 she joined startup Sonavi Labs as Chief Innovation Officer. She has written research papers for the ASME on matters related to tribology.
David E. Weston was an English physicist, who worked at the Admiralty Research Establishment. During his early career he worked with A B Wood, and is best known for his contributions to underwater acoustics. He published more than 65 papers, including 32 in the Journal of the Acoustical Society of America, and was awarded the Rayleigh Medal by the Institute of Acoustics in 1970 and the Helmholtz-Rayleigh Interdisciplinary Silver Medal by the Acoustical Society of America in 1998. Weston was president of the UK Institute of Acoustics between 1982 and 1984.
The Wallace Clement Sabine Medal of the Acoustical Society of America is presented to an individual of any nationality who has advanced the science of architectural acoustics, either by being published in professional journals or periodicals, or by another accomplishment in architectural acoustics at the discretion of the awarding body. The award was named for pioneering acoustician Wallace Clement Sabine. Founded in 1957 by the Acoustical Society of America, the award is given when an outstanding candidate is recognized.
The Pioneers of Underwater Acoustics Medal is awarded by the Acoustical Society of America in recognition of "an outstanding contribution to the science of underwater acoustics, as evidenced by publication of research results in professional journals or by other accomplishments in the field". The award was named in honor of H. J. W. Fay, Reginald Fessenden, Harvey Hayes, G. W. Pierce, and Paul Langevin.
Brian C.J. Moore FMedSci, FRS is an Emeritus Professor of Auditory Perception in the University of Cambridge and an Emeritus Fellow of Wolfson College, Cambridge. His research focuses on psychoacoustics, audiology, and the development and assessment of hearing aids.
James Edward Young is an American physicist who was the first black tenured faculty member in the Department of Physics at Massachusetts Institute of Technology. He was a founding member of the National Society of Black Physicists and a mentor for Shirley Ann Jackson.
Elizabeth Ann ("Betsy") Cohen is a Brooklyn-born California-based acoustician and engineer for the arts. She is known as a scholar of music perception, digital archiving, and advocate for music therapy.
Paul Earls Sabine was an American acoustic engineer and a specialist on acoustic architecture. Sound absorbing boards made of porous gypsum was sometimes known by the tradename Sabinite. He was a director at the Riverbank Laboratories until his retirement in 1947.