Säger som i sketchen där Hasse spelar Olof Palme. - Det var det jävligaste. Det hade jag ingen aning om.
B-, C-, D- and Z-weightings
A-frequency-weighting is mandated by the international standard IEC 61672 to be fitted to all sound level meters and are approximations to the equal loudness contours given in ISO 226.[4] The old B- and D-frequency-weightings have fallen into disuse, but many sound level meters provide for C frequency-weighting and its fitting is mandated — at least for testing purposes — to precision (Class one) sound level meters. D-frequency-weighting was specifically designed for use when measuring high level aircraft noise in accordance with the IEC 537 measurement standard.
https://en.wikipedia.org/wiki/A-weighting
Det var ju intressant. Ni som håller på och mäter vad det gäller hifi vad använder ni er av?