What sound measurement indicates the logarithmic scale of sound intensity?

The measurement that indicates the logarithmic scale of sound intensity is the decibel (dB). The decibel scale is specifically designed to express ratios of sound intensity in a way that aligns better with human perception of sound. Unlike linear scales, the logarithmic nature of decibels allows us to compress a wide range of sound intensities into a more manageable scale.

For instance, an increase of 10 dB represents a tenfold increase in sound intensity, which aligns with the way humans typically perceive changes in loudness. This logarithmic approach is crucial in audiology, as it helps in comparing sound levels that vary vastly, such as the soft sound of a whisper versus the loud noise of a jet engine.

The other measurements mentioned, such as Hertz, refer specifically to frequency (the number of cycles per second of sound waves), while Pascals measure sound pressure. These do not convey intensity in a logarithmic format and are not suited for representing perceived loudness in the same effective way that decibels do.