Musical instruments that start with the letter I include the igil, ipu, Irish uillean, Irish bouzouki, ichigenkin, inci, iya, itotele and istarski mih. The instruments originate from countries ranging from Cuba and Ireland to Croatia, Japan and the Philippines.
Beno Zerr Â· ENSTA Bretagne. Bessel functions are used to solve in 3D the wave equation at a given (harmonic) frequency. The solution is generally a sum of spherical bessels functions that gives the acoustic pressure at a given location of the 3D space.
1 Beryllium is used in the Joint European Torus fusion research facility and will be used in ITER, to condition the plasma facing components. 2  Beryllium has been used in tweeter and mid-range audio loudspeaker construction as an alternative to titanium and aluminium, largely due to its lower density and greater rigidity.