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loudness summation

a situation in which the loudness of different sounds presented together is the sum of their individual loudnesses. For example, if Sound A at 40 dB SPL (decibels sound-pressure level) has a loudness of 1 sone and Sound B at 50 dB SPL has a loudness of 2 sones, then loudness summation is said to occur if the loudness of A and B presented together is 3 sones. Loudness summation depends on the frequency composition of the sounds. See also critical band.

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Psychology term of the day

February 24th 2025

psychooncology

psychooncology

n. the study of psychological, behavioral, and psychosocial factors involved in the risk, detection, course, treatment, and outcome (in terms of survival) of cancer. The field examines responses to cancer on the part of patients, families, and caregivers at all stages of the disease. —psychooncological adj. —psychooncologist n.