Sound level in decibels
=======================

The sound level of a sound wave is a physical quantity that is used to describe the wave's
intensity.

**Links:**

#. `Wikipedia, similar formula <https://en.wikipedia.org/wiki/Sound_intensity#Sound_intensity_level>`__.

.. py:currentmodule:: symplyphysics.definitions.sound_level_in_decibels

.. py:data:: sound_level

    :attr:`~symplyphysics.symbols.classical_mechanics.sound_intensity_level` of the sound wave.

Symbol:
    :code:`L_I`

Latex:
    :math:`L_{I}`

Dimension:
    :code:`dimensionless`


.. py:data:: intensity

    :attr:`~symplyphysics.symbols.basic.intensity` of the sound wave.

Symbol:
    :code:`I`

Latex:
    :math:`I`

Dimension:
    :code:`power/area`


.. py:data:: reference_sound_level

    The sound level when the wave's intensity equals the reference intensity.

Symbol:
    :code:`L_I0`

Latex:
    :math:`L_{I0}`

Dimension:
    :code:`dimensionless`


.. py:data:: reference_intensity

    The intensity of a sound wave relative to which the sound level is measured.

Symbol:
    :code:`I_0`

Latex:
    :math:`I_0`

Dimension:
    :code:`power/length**2`


.. py:data:: definition

    :code:`L_I = L_I0 * log(I / I_0, 10)`


    Latex:
        .. math::
            L_{I} = L_{I0} \log_{10} \left( \frac{I}{I_0} \right)