The longer the pipe is, the longer the air column is, and consequently its inherent frequency and resonating frequency along with tone are low too. 管子长,空气柱也长,其固有频率和与噪声共振的频率亦低,声调就低。
Air flows from a reservoir up past leather-covered wooden pallets into pipes of various lengths, vibrating to produce different pitches. 气流由储风槽通过以皮革包覆的木制调节瓣,进入长度不同的音管,振动空气柱发出不同的音高。