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.
Bessel's functions are often used in acoustics for describing circular membranes behaviour (exploited by most of the musical instruments). They are the solutions of the wave equations using polar coordinates. Set the properties of the membrane Bessel's functions describe the vibrational modes of the membrane.
1 The inverse-logit function (i.e., the logistic function) is also sometimes referred to as the expit function. 2  In plant disease epidemiology the logit is used to fit the data to a logistic model. 3  With the Gompertz and Monomolecular models all three are known as Richards family models.