Others technique - by Fuhr glass tube (D=1,5mm) with rubber insertion. Sounding is registered by a microphone and is investigated with  the program Cool Edit Pro, Sound Forge ...etc.

It is necessary to moisten fingers with water.

viola

( Program Cool Edit..  )

( Prgram Sound Forge )

The knock  by a finger in the back plate and its spectrum analysis. It is necessary to exclude the beginning of a signal ( this site (zone) contains nonlinearity and transients)

Site (zone) of the free fading fluctuations

violin

Sound its violin

Main wood or (A1+B1)/2 = 432 Hz

- the violin over a speaker

(1)  16bit, 16,000Hz, 50Kb, mono

(2)  16bit, 16,000Hz, 24Kb, mono

(3) 16bit, 16,000Hz, 27Kb, mono

Sound other my violin

B1-  = 445 Hz

(4) 16bit, 16,000Hz, 32Kb, mono

(5) 16bit, 11.000Hz,  70Kb, mono

By Fuhr   ( some part of tuning)

Sound  B1   ( Main wood..... (?)  )

If you do vibration through a glass (by Fuhr), in this case it is important to have a pure  (near to a sinusoid) and strong tone of some height... At first I apply a part of a tube with a rubber insertion. The frequencies of adjacent sites should be  little differ (probably in limits of a halftone...) At test by Fuhr by a part of a tube without a rubber insertion, you receive (will have) other tone. Smaller site in this case vibrates. In the sounding of a violin these frequencies can be useful in selection of high-frequency formants  (~2000 - 3500 Hz....)                                      Here we have a big field for creativity.

Sound its violin    (16 bit   25kHz  mono  80 Kb)

B1

For example  programm Wave Lab... Sounding G... and its spectrum analisis.

And its spectrum analisis ( program  Sound Forge... )

Next