Hunting high and low

摘要

Subsonic frequencies came to the movies in 1974, with Earthquake and Universal/MCA's Sensurround system. Rumble and vibration effects, including frequencies down to about 16Hz at high levels, shook audiences as intended, if sometimes making people feel ill and even causing structural damage to theatres.rnAlthough Sensurround was dropped, it encouraged the inclusion of low-frequency effects in later multichannel formats. REL prospered in the 1990s, as it does today under the ownership of Sumiko, because every 5.1 system had to have a subwoofer. But 'earthquake bass' wasn't on Richard Lord's original agenda. REL, the company he founded, came into being because he was trying to improve his two-channel music system.