Detection of small changes of stimulus magnitude is an important in localizing sound sources, music appreciation, and understanding speech. In fact, differential sensitivity is important across all three physical characteristics $--$ frequency, intensity, and duration $--$ in speech perception.

For each example listed below, determine whether this describes differential sensitivity of intensity and frequency or differential sensitivity of duration.

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Differentiation of phonemes across manner $($ e $.$ g $.,/$ sh $/$ ?versus $/$ p $/).$

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Differentiation between consonants and vowels. $($ e $.$ g $.,/$ k $/$ ?versus $/$ i $/).$

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Differentiation between voiceless and voiced consonants $($ e $.$ g $.,/$ t $/$ ?versus $/$ d $/).$

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Differentiation of phonemes within manner $($ e $.$ g $.,/$ f $/$ ?versus $/$ s $/).$