def place2f(x):
    """Converts a basilar membrane place (mm) to a frequency (Hz)
        
        Takes a basilar membrane place (mm), and computes a frequency (Hz), 
        using the Greenwood equation, and constants suitable for human ears.

        Parameters
        ----------
        x : scalar
            A basilar membrane place, in mm.
        
        Returns
        -------
        f : scalar
            A frequency, in Hz.
    """
    return 165.4 * (10 ** (0.06 * x) - 0.88)
