acoustics.py 文件源码

def absorption_coef(self):
        """Returns a helper variable (called mu in publications by L. Claes) that sums up all
        losses into a single quantity."""

        if not self._absorption_coef:
            return (4/3 * self.shear_viscosity + self.bulk_viscosity + self.thermal_conductivity *
                    (self.isobaric_heat_cap - self.isochoric_heat_cap) /
                    (self.isobaric_heat_cap * self.isochoric_heat_cap))
        else:
            return self._absorption_coef