What type of noise focuses on a narrow range of frequencies of equal intensity and is used in pure tone testing?

Narrow Band Noise is specifically designed to emphasize a limited range of frequencies, providing a uniform intensity across that specific band. This characteristic makes it particularly useful in pure tone testing, as the focus on a narrow frequency range allows for clearer assessment of an individual's hearing capabilities within that spectrum. In the context of hearing tests, this type of noise can be utilized to isolate hearing responses and determine the threshold of hearing at specific frequencies without interference from broader sounds.

This feature of Narrow Band Noise also differentiates it from broader noise types, such as Wide Band Noise, which encompasses a much wider range of frequencies and would not be ideal for focused frequency testing. Similarly, options like White Noise, which contains all frequencies at equal intensity, lack the specificity needed for pure tone testing. Therefore, the distinctive characteristic of Narrow Band Noise makes it the preferred choice when conducting tests pertinent to auditory frequency sensitivity.