What is the maximum sound pressure level (SPL) when there is input compression?

The maximum sound pressure level (SPL) when there is input compression is typically associated with the performance limits of hearing aids or other electroacoustic devices. When input compression is applied, it serves to limit the overall volume output, especially in response to louder sounds, ensuring that sounds do not exceed a level that could be harmful to the user or cause discomfort.

The significance of the choice indicating 117 dB SPL lies in its alignment with industry standards for maximum output levels of many hearing aids or similar devices that employ compression technology. This level is considered safe and manageable for individuals with hearing loss, striking a balance between audibility and potential auditory damage.

Other values in the list may represent theoretical maximum outputs or settings for different types of audio equipment but would not be as representative of the practical maximum output levels established in clinical practice for devices utilizing input compression. Therefore, 117 dB SPL is regarded as the most applicable figure for maximum sound pressure levels in this context.