affirmative action

a policy designed to promote equal educational or employment opportunities by requiring active recruitment or promotion of people from minority groups or another protected class. The policy is controversial in some of its aspects and has been subject to legal challenges, particularly on the grounds that it constitutes reverse discrimination.

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Psychology term of the day

January 21st 2025

equal loudness contour

the function relating decibels sound-pressure level (dB SPL) to frequency for pure tones that have a loudness equal to that of a 1-kHz tone at a fixed level. For example, a 100 Hz tone presented at 70 dB SPL is as loud as a 1 kHz tone presented at 60 dB SPL. This is a point on the equal loudness contour for a 60-phon reference. This function has been incorporated in audio circuitry as “loudness compensation,” primarily in an attempt to correct for the decreased loudness of low frequencies when listening at low levels. See loudness.