Calculations of the sound transmission over theater seats and methods for its improvement in the low‐frequency range

It is well known that sound waves propagating over rows of theater seats are subject to selective attenuation at low frequencies. Theoretical calculations of the sound transmission were carried out for various boundary conditions of the seat and floor combination. The results show that the attenuation always appears in the frequency range of 50–200 Hz and that it can be reduced by absorbing floor surfaces. In order to realize an absorbing floor in the required frequency range, effects of installing slit resonators under the floor are examined.