Hou T Z, Luan J Y, Wang J Y, Li M D
Xinjiang Academy of Forestry Science, Urumqi, China.
Am J Chin Med. 1994;22(3-4):205-14. doi: 10.1142/S0192415X94000267.
Studies on the sound characteristics of phylodendron performed by measuring the power of plant leaves with a laser beam found that the leaves of phylodendron could produce sound waves at relatively low frequencies (from 50 Hz to 120 Hz). Furthermore, it was found that those leaves could accept external sound wave stimulations, with frequencies lower than 150 Hz giving the strongest responses. When the plants were under stress, such as drought, the sound emissions from the plant's leaves increased approximately 20-30 dB, while the range of response to external sound wave stimulation decreased 10-20 dB. However, these increased emissions returned to normal six minutes after watering. When the stainless steel needles were inserted into the petiole of the plant, spontaneous sound production was increased about 40 dB for the main vein and 6 dB for the mesophyll. This is our third report on experimental evidence that plants might have a meridian system as in humans and other animals.
通过用激光束测量植物叶片的功率对龟背竹声音特性进行的研究发现，龟背竹的叶子能够在相对较低的频率（50赫兹至120赫兹）产生声波。此外，还发现这些叶子能够接受外部声波刺激，频率低于150赫兹时反应最强。当植物受到干旱等胁迫时，植物叶片发出的声音增加约20 - 30分贝，而对外部声波刺激的反应范围减小10 - 20分贝。然而，浇水六分钟后，这些增加的声音排放恢复正常。当将不锈钢针插入植物叶柄时，主脉的自发声音产生增加约40分贝，叶肉增加6分贝。这是我们关于植物可能像人类和其他动物一样拥有经络系统的实验证据的第三份报告。
