Programmer Guide/Command Reference/EVAL/hz2bark: Difference between revisions

Latest revision as of 10:53, 21 April 2011

Convert all elements of x from Hertz to Bark and vice versa.

Usage

hz2bark(x)

bark2hz(x)

Result

The result r has the same type as x and contains the converted elements of x.

hz2bark: Uses the algorithm published by Zwicker and Fastl (1990) to convert frequencies from Hz to Bark:; r_i,j = 13 * atan(0.76*x_i,j/1000) + 3.5 * atan((x_i,j/7500)^2)
bark2hz: Because the above formula is not directly invertable, an iteration algorithm is used to convert the x_i,j from Bark to the result r_i,j in Hz.

Note: Both functions are also available in the expressions used in the NUM and INT command.

@@ Line 1: / Line 1: @@
-{{DISPLAYTITLE:{{SUBPAGENAME}}}}
+{{DISPLAYTITLE:hz2bark, bark2hz}}
-=====hz2bark=====
+Convert all elements of ''x'' from Hertz to Bark and vice versa.
+;Usage: <code>hz2bark(<var>x</var>)</code>
+:<code>bark2hz(<var>x</var>)</code>
+:;<var>x</var>: a scalar, vector or matrix
+;Result: The result ''r'' has the same type as ''x'' and contains the converted elements of ''x''.
+:;'''hz2bark''': Uses the algorithm published by Zwicker and Fastl (1990) to convert frequencies from Hz to Bark:
+::''r''<sub>i,j</sub> = 13 * atan(0.76*''x''<sub>i,j</sub>/1000) + 3.5 * atan((''x''<sub>i,j</sub>/7500)^2)
+:;'''bark2hz''': Because the above formula is not directly invertable, an iteration algorithm is used to convert the ''x''<sub>i,j</sub> from Bark to the result ''r''<sub>i,j</sub> in Hz.
+:Note: Both functions are also available in the expressions used in the [[Programmer_Guide/Command_Reference/NUM|NUM]] and [[Programmer_Guide/Command_Reference/INT|INT]] command.
+;See also: [[../hz2mel|hz2mel, mel2hz]], [[../hz2erb|hz2erb, erb2hz]], [[../hz2cent|hz2cent, cent2hz]], [[../hth|hth]], [[../log2lin|lin2log, log2lin]]
-Hertz to Bark conversion.
+[[../#Functions|<function list>]]
-=====Usage:=====
-<code>hz2bark(<var>x</var>)</code>