We found one dictionary that defines the word equal-loudness contours:

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1. Equal-loudness contours: Wikipedia, the Free Encyclopedia

▸ Words similar to equal-loudness contours ▸ Usage examples for equal-loudness contours ▸ Idioms related to equal-loudness contours ▸ Wikipedia articles (New!) ▸ Words that often appear near equal-loudness contours ▸ Rhymes of equal-loudness contours ▸ Invented words related to equal-loudness contours