def METHOD_NAME(F, floor=0.1, min_db=-80):
    """Log-normalizes features such that each vector is between min_db to 0."""
    assert min_db < 0
    F = min_max_normalize(F, floor=floor)
    F = np.abs(min_db) * np.log10(F)  # Normalize from min_db to 0
    return F