utils.py 文件源码

def db(data, power=False):
    '''Convenience function to calculate the 20*log10(abs(x))

    Parameters
    ----------
    data : array_like
       signals to be converted to db
    power : boolean
       data is a power signal and only needs factor 10

    Returns
    -------
    db : array_like
       20 * log10(abs(data))
    '''
    if power:
        factor = 10
    else:
        factor = 20
    return factor * np.log10(np.abs(data))