Let's talk about the other end of the acoustical spectrum, sound that is too high for humans to hear—ultrasound.

让我们来谈谈声谱的另一端，人类听不到的声音——超声波。

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“People who are really nuts for this kind of thing don’t talk about lows and highs, they talk about the space of sound,” he says, dropping the needle on Miles Davis’s Sketches of Spain.

“疯狂热爱这类东西的人们不谈论低或高，他们谈论声音的空间感，”他说着，把指针放到迈尔斯·戴维斯的《西班牙素描》上。

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“People who are really nuts for this kind of thing don’t talk about lows and highs, they talk about the space of sound, ” he says, dropping the needle on Miles Davis’s Sketches of Spain.

“疯狂热爱这类东西的人们不谈论低或高，他们谈论声音的空间感，”他说着，把指针放到迈尔斯·戴维斯的《西班牙素描》上。

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The 'Dean scream' dirty trick which, as you know, was created by filtering out the deafening crowd's roar to create the false impression of a maniacal yell (a sound clip used to this day during the Political Junkie segment on NPR's Talk of the Nation).

NPR: Ready, Ames, Fire: The Iowa Straw Poll

All this talk of "community building" may sound amorphous, but the Omidyars are encouraged by their difference.

FORBES: The Radical Philanthropist

The Cottagers came out for the second half to the sound of The Clash's London Calling and whether it was the sound of manager Mark Hughes's half-time team talk or Joe Strummer's rallying call, the home side looked a lot more lively.

BBC: Fulham 0-0 Everton