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Haar, Bavaria, a municipality near Munich, Germany

a Hungarian mathematician named Alfred Haar (1885 - 1933). He has the Haar wavelet, and a set-theoretic measure, the Haar measure, named after him

Haar-like features (so called because they are computed similar to the coefficients in Haar wavelet transforms)

a Scots word for the fog or sea mist occurring along the east coast of Scotland

Often a type of calling technique used in early cultures to indicate distress, or need. The sound is made verbally, and sounds like a hollow, short, rasp - 'Haar'.

German, Dutch word for Hair.