In the context of assistive listening devices, SNR stands for which term?

In the context of assistive listening devices, SNR stands for which term?

• A. Sound-to-Noise Ratio
• B. Signal-to-Noise Ratio
• C. Signal-to-Signal Ratio
• D. Sound-to-Signal Ratio

Answer: (B)

SNR, or Signal-to-Noise Ratio, is a measure of how loud the desired sound is compared with the surrounding noise. In assistive listening devices, the key idea is that speech (the signal you want) should stand out from background sounds (the noise). This ratio is usually shown in decibels and is found by subtracting the noise level from the signal level. For example, if speech is 60 dB and ambient noise is 50 dB, the SNR is +10 dB, meaning the speech is ten decibels louder than the noise. A higher SNR makes understanding speech easier, and devices improve SNR by boosting the signal, reducing noise, or both. The other options don’t fit standard terminology because they mislabel the components (sound vs. signal) or refer to a different kind of ratio.

SNR, or Signal-to-Noise Ratio, is a measure of how loud the desired sound is compared with the surrounding noise. In assistive listening devices, the key idea is that speech (the signal you want) should stand out from background sounds (the noise). This ratio is usually shown in decibels and is found by subtracting the noise level from the signal level. For example, if speech is 60 dB and ambient noise is 50 dB, the SNR is +10 dB, meaning the speech is ten decibels louder than the noise. A higher SNR makes understanding speech easier, and devices improve SNR by boosting the signal, reducing noise, or both. The other options don’t fit standard terminology because they mislabel the components (sound vs. signal) or refer to a different kind of ratio.