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Basic chordophone types

Aerophones

In aerophones, the sound is produced by vibrating air (usually inside the instrument). The instrument, or parts of the instrument, are shaped (often into a tube or set of tubes) so that the vibrations will be a particular length, and so a particular pitch (see Sound, Physics and Music .) Aerophones are grouped according to what causes the air to begin vibrating.

The melodeon, like its close relatives the accordion and the concertina, is a free-reed aerophone.

    Aerophone categories

  • In whistles , the air is blown at a sharp edge in the instrument (as in recorders as well as police whistles).
  • In blowhole instruments, the air is blown across the sharp edge at the blowhole. When the instrument is tube-shaped, the blowhole can be in the end ("end-blown", as in panpipes), or in the side of the instrument ("side-blown", as in a fife).
  • In reed instruments, the vibration of a reed or reeds begins the air vibration. In single reed (saxophone, for example) and double reed (oboe) instruments, the one or two reeds are part of the mouthpiece. In bagpipes and in free-reed instruments (such as harmonica and accordion), the single or double reeds are mounted somewhere inside the instrument and there can be many of them - sometimes a different reed for every pitch.
  • In cup mouthpiece instruments, the player buzzes the lips against the mouthpiece, causing a sympathetic vibration in the air inside the instrument. (bugle, conch shell).
  • The pipes of an organ have a sharp edge like a whistle, but the pipes are filled with air from something other than a mouth or nose, usually a bellows of some sort.
  • Free aerophones (bull-roarers, toy spinning tops), cause vibrations in the air around them rather than inside them.

Membranophones

In membranophones, the sound begins with the vibration of a stretched membrane, or skin (often an actual animal skin), but the skin is usually stretched across a resonator . Membranophones are usually classified according to the shape of the resonating body of the instrument.

Membranophones are classified by their basic shape. For example, a drum that is wider at top and bottom than in the middle is a waisted tubular drum.

    Membranophone categories

  • Tubular drums are divided into cylindrical , conical , barrel , long , waisted (hourglass-shaped), goblet (with a stem at the base), and footed (with feet around the edge of the bottom).
  • Kettledrums or vessel drums have rounded bottoms.
  • In frame drums , the membrane is stretched over a frame, usually making a wide, shallow instrument. (Tamborines are in this category.)
  • Friction drums come in a variety of shapes. Instead of beating on the membrane, the player runs a stick through a hole in the membrane.
  • In mirlitons , the membrane is made to vibrate by blowing air across it. These are the only membranophones that are not drums. (Kazoos are in this category.)

Idiophones

In idiophones, it is the vibration of the instrument itself that is the main source of the musical sound. Idiophones are classified according to what you do to them to make them vibrate.

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
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Sherica
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Sherica
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Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
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Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
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J, combine like terms 7x-4y
Bridget Reply
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Asali
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Samantha
what is the problem that i will help you to self with?
Asali
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
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what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
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I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
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Yasmin
what is the function of carbon nanotubes?
Cesar
what is nanomaterials​ and their applications of sensors.
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what is nano technology
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what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
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AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
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Source:  OpenStax, A parent's guide to band. OpenStax CNX. Jun 25, 2007 Download for free at http://cnx.org/content/col10428/1.1
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