[Q] physical meaning of the 'acoustic mass'

[Ki-Young Park <pkyoung@xxxxxxxxxxxxxxxxxx>]

Dear, all

I am a ph.d student on speech signal processing
on the electrical engineering basis.

I am working on auditory model now.
During my work, I come across with the term 'acoustic mass'
which comes from electroacoustics.

I found some explanation on the acoustic mass,
but still I can't understand the "physical" meaning of the
'acoustic mass' and why the unit of the
'acoustic mass' is kg/m^4.

Is there simple explanation or web pages I can refer?

Thanks.