Sketch predicated data for a normal$-$hearing listener for the following notched noise experiment.

The signal to be detected is $1000$ Hz in a noise with a notch. Thresholds for this signal are measured at different notch bandwdiths $($placed symmetrically around the signal frequency$)$: $0,25,50,75,100,$ and $200$ Hz$.$ The experiment is conducted at two masker levels: one high $($eg$.80$ dB SPL$)$ and one low $(30$ dB SPL$)$

Sketch will show:$$

The condition $($high or low level$)$ that produces the most masking for the $0-$ Hz notch $($ i$.$e$.$ no spectral notch$)$

The condition $($ high or low level$)$ that yields less frequency$-$ specific data in your sketch, you should consider the size of the auditory filter$$s bandwidth at $1000$ Hz and the effects of level o masking and the auditory bandwidth