At SNR +18, the normal hearing percentage is?

At SNR +18, the normal hearing percentage is?

• A. 95%
• B. 100%
• C. 90%
• D. 85%

Answer: (B)

In speech-in-noise assessments, the signal-to-noise ratio shows how much louder the speech is than the background noise. As this ratio becomes more favorable (speech much louder than noise), understanding improves and normal-hearing listeners reach ceiling performance. At a very strong positive SNR like +18 dB, the speech stands out clearly, so a normal-hearing listener can understand essentially everything, yielding 100% correct. The smaller percentages would occur at less favorable SNRs where noise interferes more with speech perception, but at +18 dB SNR, full performance is expected.

In speech-in-noise assessments, the signal-to-noise ratio shows how much louder the speech is than the background noise. As this ratio becomes more favorable (speech much louder than noise), understanding improves and normal-hearing listeners reach ceiling performance. At a very strong positive SNR like +18 dB, the speech stands out clearly, so a normal-hearing listener can understand essentially everything, yielding 100% correct. The smaller percentages would occur at less favorable SNRs where noise interferes more with speech perception, but at +18 dB SNR, full performance is expected.