Sometimes, for the sake of appearance or of the desired " feel " of the instrument, a drum with a trigger will be used as a trigger pad by muffling it so heavily that no significant sound at all is produced, see Electronic drum # Acoustic triggered drum kit.

Acoustic guitars ( and similar instruments ) with hollow bodies have been in use for over a thousand years.

Acoustic resonance is a branch of mechanical resonance that is concerned with the mechanical vibrations across the frequency range of human hearing, in other words sound.

Acoustic phonetics is a subfield of phonetics which deals with acoustic aspects of speech sounds.

Acoustic phonetics deals with the physical properties of sound, what sounds exactly are coming from the person speaking.

** Acoustic metamaterials, engineered materials with atypical properties

Under a new contract with Sony Music, Lauper released The Body Acoustic, an album that featured acoustic reinterpretations of tracks from her back catalog.

However, it wasn't until the 2006 Body Acoustic Tour that she played the song regularly in full again, and she frequently opened the True Colors 2007 Tour with it.

He also released Acoustic Cafe, an album, that with the exception of " You Have My Heart ," is a collection of covers ranging from Bob Dylan (" If Not For You ," " Make You Feel My Love ") to Cyndi Lauper (" Time After Time ").

In September 1942 Atanasoff left Iowa State for a wartime assignment as Chief of the Acoustic Division with the Naval Ordnance Laboratory ( NOL ) in Washington, D. C .; no patent application for the ABC was subsequently filed by Iowa State College.

2: Harmonic and Acoustic Theory ( Cambridge ), pp. 119 – 89, English translation with introduction and notes, ISBN 0-521-61697-2

The U. S. Navy's Acoustic Research Detachment in nearby Bayview conducts research with large-scale submarine models in the deepwater lake.

* December 13 / 14 – The Los Angeles, California radio station KROQ-FM airs the 14th Annual of the Acoustic Christmas show with AFI, Blink-182, Brand New, Chevelle, The Distillers, Jane's Addiction, Jet, KoЯn, Linkin Park, The Offspring, P. O. D., Pennywise, Puddle of Mudd, Rancid, Staind, 311, Thrice and Trapt.

However, Gil says that his 1994 album Acoustic was not such a new direction, as he had previously performed unplugged with Caetano Veloso.

In August 2006 in Atlanta, Georgia, he performed on The Acoustic Planet Tour with Bela Fleck & The Flecktones and Umphrey's McGee.

Acoustic guitar-based, with a more pronounced electric guitar and keyboard section than their first album, their second effort helped continue America's success, and includes one of their best known hits, " Ventura Highway ".

Recently completed is a 450-seat concert hall, called the Bramall Music Building, which completes the redbrick semicircle of the Aston Webb building designed by Glenn Howells Architects with venue design by Acoustic Dimensions.

Acoustic Doppler velocimetry ( ADV ) is designed to record instantaneous velocity components at a single point with a relatively high frequency.

The album, coupled with McCain's first DVD, Mile Marker: Songs and Stories from the Acoustic Highway ( 2002 )-which consisted of interviews, live performances and other material-served as a thank-you to long-time followers.

However, Electric Acoustic Stimulation ( EAS ) devices, including the Hybrid " short-electrode " cochlear implant, have been developed that combine a cochlear implant with a sound amplifying hearing aid.

Acoustic Romanian style of music, inspired by American folk music, with sweet lyrics and played almost exclusively at the guitar.

" Back Porch Hillbilly Blues-Volume 1 " ( Locust, 2003 ), with " Acoustic Hillbilly Jive " and " Blue Sky Highway and Tyme ", and " Back Porch Hillbilly Blues Volume 2 " ( Locust ) ahowcase a meeting of henry flynt's vision of rural roots music and American minimalism.

Acoustic amplifiers are designed to produce a " clean ", transparent, " acoustic " sound when used with acoustic instruments with built-in transducer pickups and / or microphones.

Acoustic theory is the field relating to mathematical description of sound waves.

Acoustic guitars are commonly constructed in several different body shapes.

; Stethoscope: Acoustic device for hearing internal sounds including heart sounds.

Throughout the world there are many organizations and institutions dedicated to the area of computer and electronic music study and research, including the ICMA ( International Computer Music Association ), IRCAM, GRAME, SEAMUS ( Society for Electro Acoustic Music in the United States ), CEC ( Canadian Electroacoustic Community ), and a great number of institutions of higher learning around the world.

The Guitar Book: A Handbook for Electric & Acoustic Guitarists.

Acoustic impedance of the embouchure hole appears the most critical parameter.

Acoustic problems always require allowing compressibility, since sound waves are compression waves involving changes in pressure and density of the medium through which they propagate.

Acoustic guitars are several notable subcategories within the acoustic guitar group: classical and flamenco guitars ; steel-string guitars, which include the flat-topped, or " folk ," guitar ; twelve-string guitars ; and the arched-top guitar.

Acoustic bass guitars have steel strings or gut strings and often the same tuning as an electric bass guitar.

During this time, Linkin Park received many invitations to perform on many high-profile tours and concerts including Ozzfest, Family Values Tour and KROQ Almost Acoustic Christmas.

However, recently other techniques for droplet manipulation have also been demonstrated using Surface Acoustic Waves, optoelectrowetting, mechanical actuation, etc.

Acoustic droplet ejection uses a pulse of ultrasound to move low volumes of fluids ( typically nanoliters or picoliters ) without any physical contact.

In addition to Pixies and LoudQUIETloud, four other Pixies ' DVDs were released between 2004 and 2006, all featuring concert performances: Live at the Town and Country Club 1988, The Pixies — Sell Out, The Pixies Acoustic: Live in Newport, and The Pixies Club Date: Live at the Paradise in Boston.

Scientific article describing research report " The Acoustic Properties of Unexplained Rapping Sounds " in the Journal of the Society for Psychical Research Vol 73. 2 Number 899 pp 65 – 93.

* Acoustic spectroscopy involves radiated pressure waves.

Acoustic and mechanical responses are due to collective motions as well.

Acoustic stethoscopes are familiar to most people, and operate on the transmission of sound from the chest piece, via air-filled hollow tubes, to the listener's ears.

Acoustic stethoscopes are the most commonly used.

Acoustic location in air was used before the introduction of radar.

Acoustic homing formed the basis for torpedo guidance after the Second World War.

* Johnson, Keith, Acoustic & Auditory Phonetics, second edition, 2003.