# bark2hz

Convert from Bark scale to hertz

## Syntax

``hz = bark2hz(bark)``

## Description

example

````hz = bark2hz(bark)` converts values on the Bark frequency scale to values in hertz.```

## Examples

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Set two bounding frequencies in Hz and then convert them to the Bark scale.

`b = hz2bark([20,8000]);`

Generate a row vector of 32 values uniformly spaced on the Bark scale.

`barkVect = linspace(b(1),b(2),32);`

Convert the row vector of values into equivalent frequencies in Hz.

`hzVect = bark2hz(barkVect);`

Plot the two vectors for comparison. As Bark values increase linearly, Hz values increase exponentially.

```plot(barkVect,hzVect,'o') title('Bark vs Hz') xlabel('Bark') ylabel('Hz') grid on```

## Input Arguments

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Input frequency on the Bark scale, specified as a scalar, vector, matrix, or multidimensional array.

Data Types: `single` | `double`

## Output Arguments

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Output frequency in Hz, returned as a scalar, vector, matrix, or multidimensional array the same size as `bark`.

Data Types: `single` | `double`

## Algorithms

The frequency conversion from the Bark scale to Hz uses the following formula:

`$\begin{array}{l}if:bark<2\to bark=\frac{\left(bark-0.3\right)}{0.85}\\ if:bark>20.1\to bark=\frac{\left(bark+4.422\right)}{1.22}\\ hz=1960\left(\frac{bark+0.53}{26.28-bark}\right)\end{array}$`

The Bark value correction occurs before the conversion from the Bark scale to Hz.

## References

[1] Traunmüller, Hartmut. "Analytical Expressions for the Tonotopic Sensory Scale." Journal of the Acoustical Society of America. Vol. 88, Issue 1, 1990, pp. 97–100.