For the 40 phon sound level shown in Fig. 11.12 an A/D converter is to be provided to assure a resolution of ±1 dB at the minimum SPL condition while also providing a voltage output of 0.4 V at the 80-dB SPL condition. Specify the number of bits required for the converter.
![541_d2badebb-ff52-4e42-846c-e7e29f207a89.png](https://secure.tutorsglobe.com/CMSImages/541_d2badebb-ff52-4e42-846c-e7e29f207a89.png)