* 1939 – John Fahey, American steel-string acoustic guitarist ( d. 2001 )

The guitarist has several ways of playing the guitar depending on the type of strings ( see Nylon-string guitar or Steel-string acoustic guitar ) and including the guitar pick, fingernail, and / or fingertip ( see fingerstyle guitar ).

* John Ford Coley ( born 1948 ), American pianist, guitarist, actor and author ; one-half of 1970 – 80 acoustic act, England Dan & John Ford Coley

.. the entire album, anchored by Latin-styled acoustic guitar trums and the velvety vocals of Lee and guitarist Bryan Maclean, is remarkably consistent at a lofty level.

George Beauchamp was a vaudeville performer, violinist, and steel guitarist who, like most of his fellow acoustic guitarists in the pre-electric-guitar days of the 1920s, was searching for a way to make his instrument cut through an orchestra.

This directional effect is intended to interact with the room acoustics to add interest to the sound, in much the same way as an acoustic guitarist may swing the box around on a final sustain, or the rotating baffle of a Leslie speaker will spin the sound around the room.

A reminder of their earlier folk incarnation was Kaukonen's solo acoustic guitar tour de force, " Embryonic Journey " ( his first composition ), which referenced contemporary acoustic guitar masters such as John Fahey and helped to establish the popular genre exemplified by acoustic guitarist Leo Kottke.

Phil Keaggy ( born Philip Tyler Keaggy, in Youngstown, Ohio on March 23, 1951 ) is an American acoustic and electric guitarist and vocalist who has released more than 50 albums and contributed to many more recordings in both the contemporary Christian music and mainstream markets.

Phil Keaggy and guitarist Mike Pachelli released an acoustic instrumental project titled Two of Us.

* Joanne Shenandoah, an Iroquois singer and acoustic guitarist

* Leo Kottke, acoustic guitarist

* El McMeen, attorney and acoustic steel-string fingerstyle guitarist

* Ralph Towner, acoustic guitarist ( b. 1940 )

Best known for his electric guitar skills, Johnson is also a highly proficient acoustic, lap steel, resonator, and bass guitarist as well as an accomplished pianist and vocalist.

He recruited acoustic fingerstyle guitarist Jon Mark and flautist-saxophonist John Almond.

Mark Kerr would also contribute to the project ( this time as an acoustic guitarist and Burchill's co-writer on a number of songs ) while Jim Kerr brought in various Italian musicians as collaborators, including Planet Funk and Phunk Investigation.

Musicians backing her on the single included 17 dollar acoustic guitarist Speedy West and guitarist Roy Lanham.

The Bad Examples is an indie alternative pop-rock group formed by songwriter, acoustic guitarist, and vocalist Ralph Covert in 1987 in Chicago, Illinois.

Racoon starts as an acoustic duo: singer Bart van der Weide and guitarist Dennis Huige.

* John Russell ( musician ) ( born 1954 ), improvising acoustic guitarist and concert promoter

Scantlin sometimes tours with Alice in Chains guitarist Jerry Cantrell, playing acoustic Alice in Chains songs.

Gates ' regular acoustic guitarist, Graham Kearns, also worked with Tzuke and has writing credits with Gates on both albums.

The word " acoustic " is derived from the Greek word ακουστικός ( akoustikos ), meaning " of or for hearing, ready to hear " and that from ἀκουστός ( akoustos ), " heard, audible ", which in turn derives from the verb ἀκούω ( akouo ), " I hear ".

Physicists and acoustic engineers tend to discuss sound pressure levels in terms of frequencies, partly because this is how our ears interpret sound.

The Spectrogram produced by such an instrument is a graphical display of the time varying pressure level and frequency profiles which give a specific acoustic signal its defining character.

where is the acoustic pressure and is the acoustic fluid velocity vector, is the vector of spatial coordinates, is the time, is the static mass density of the medium and is the bulk modulus of the medium.

The acoustic wave equation is a combination of these two sets of balance equations and can be expressed as

In that case the acoustic wave equation is written as

An important simplifying assumption for acoustic waves is that the amplitude of the disturbance of the field quantities is small.

To do that we assume that the medium is an ideal gas and all acoustic waves compress the medium in an adiabatic and reversible manner.

The value of is 1. 4 if the acoustic medium is air.

Then the solution of the acoustic wave equation is

The steel-string acoustic guitar is a modern form of guitar that descends from the classical guitar, but is strung with steel strings for a brighter, louder sound.

Alternative sources, however, state that McCartney and the other Beatles tried a variety of instruments, including drums and an organ, and that George Martin later persuaded them to allow McCartney to play his Epiphone Texan steel-string acoustic guitar, later on editing-in a string quartet for backup.

Since the 1990s, however, many opera houses have begun using a subtle form of sound reinforcement called acoustic enhancement ( see below ).

In 1949 the canvas awning was removed and replaced with fluted aluminium panels below the glass roof, in a new attempt to solve the echo ; however, the acoustics were not properly tackled until 1969 when a series of large fibreglass acoustic diffusing discs ( commonly referred to as " mushrooms " or " flying saucers ") were installed below the ceiling to reduce the notorious echo.

In recent years, however, VAST's sound has been more identifiable with acoustic rock in releases such as April and Me and You.

The internal appearance of the radio frequency ( RF ) anechoic chamber is sometimes similar to that of an acoustic anechoic chamber, however, the interior surfaces of the RF anechoic chamber are covered with radiation absorbent material ( RAM ) instead of acoustically absorbent material.

The input signal a spectrum analyzer measures is electrical, however, spectral compositions of other signals, such as acoustic pressure waves and optical light waves, can be considered through the use of an appropriate transducer.

On October 30, 2009, however, Chris announced via Twitter and Facebook that, due to a last-minute family emergency, the band would be cancelling their Alter the Ending tour with New Found Glory and Never Shout Never with the exception of November 7 with the Louisville Orchestra ; although the longer tour with New Found Glory and Never Shout Never was cancelled, Chris announced on his website on November 10, 2009 that he and John will begin a 13-date acoustic tour with New Found Glory ( who will be playing an acoustic set as well ) on November 30, 2009.

In 1972 and for much of his career, Godchaux played acoustic piano ; however, he played the Fender Rhodes frequently in 1973 and 1974.

The timbre ( tone color ) of a standard unamplified violin is due in large part to these resonances, however, so depending on how the signal is picked up, an electric violin may have a " rawer " or " sharper " sound than an acoustic instrument.

This was considered an unusual move for a prog rock band, since progressive rock tends to focus a lot on the use of electronic synthesisers and electric guitars ; however, the melodic qualities of the band's compositions proved to be well-suited to an acoustic context, and the album was reasonably successful.

It was also added that they already had some material written for a " heavy " album however this album would wait until after the acoustic album was released.

It has, however, been suggested that a small black hole ( of sufficient mass ) passing through the Earth would produce a detectable acoustic or seismic signal .< ref > The Schwarzschild radius of a 10 < sup > 15 </ sup > grams black hole is ~ 148 fm () ( which is much smaller than an atom, but larger than an atomic nucleus )</ ref >

Her Edison recordings, however, represent not only some of the best operatic recordings released by that company, but also Muzio's power and ability to project her personal intensity through the difficult acoustic recording process.

Violette points out, however, that drone metal is " as much a physiological phenomenon as an acoustic one ", with an attendant physicality.

Throughout the 1980s, the acoustic scene did not exist, however, the appearance of the first unplugged concerts in the late 1980s introduced the popularity of acoustic music in the following decade.

It is important to differentiate busking to Guerrilla Gigging, however for a predominantly acoustic artist such as Badly Drawn Boy the line between the two performance methods can become blurred.

Current research conducted by GEERG involves the study of the behaviour of the Greenland shark by observing it underwater using scuba and video equipment and by placing acoustic and satellite tags ( telemetry ) on live specimens ; however, overall very little is known about this mysterious species.

The T4 was not an ordinary straight-running torpedo, however ; it was the world's first acoustic homing torpedo.

He has stated that most of the time he composes and arranges music is at his home studio, where his friends help out by recording acoustic instruments ; if the quality of these recordings are not adequate, however, Eguchi replaces them at the company's studio.

During and following the tour, Kiss has again replaced the song on the setlist ; however, the song is now sung by Eric Singer on vocals and Paul Stanley and Tommy Thayer on acoustic guitars.

The sordun, however, having a cylindrical bore, has the acoustic properties of the stopped pipe, i. e. the sound waves are twice the length of the pipe, so that to produce a sound of any given pitch, for instance for C, the bore need only be half the length, i. e. 4 ft. long.