Parrot J, Petiot J C
C R Seances Soc Biol Fil. 1981;175(6):851-8.
Human subjects were exposed for two (or three) sessions to the same runs of 103 dB (A) pink noise-steps alternating with 40 dB (A) low level pink noise. From one session to the following their cardiovascular responses seem to achieve an adjustment. Differences between them depend on two features: (1) some of them achieve a negative feedback reaction from the second exposure, when in others such a reaction is delayed until the third exposure; (2) parallelism or opposition between evolutions of heart rate and arterial blood pressure respectively.
人类受试者在两（或三）个时段内暴露于相同的103分贝（A）粉红噪声阶跃与40分贝（A）低水平粉红噪声交替的环境中。从一个时段到下一个时段，他们的心血管反应似乎实现了一种调整。他们之间的差异取决于两个特征：（1）其中一些人在第二次暴露时就实现了负反馈反应，而在另一些人中，这种反应会延迟到第三次暴露；（2）心率和动脉血压变化之间的平行或相反关系。
