This is the 6174th most frequent Chinese word.
干扰
Interference; disturbance.
Here, '干扰' (interference) describes the disruption caused by noise to one’s ability to concentrate on studying.
这个噪音干扰了我的学习。
This noise interfered with my studies.
In this usage, '干扰' indicates the effect of one factor (light) disturbing the natural sleep process.
不要让电子设备的光干扰你的睡眠。
Do not let the light from electronic devices disrupt your sleep.
This instance of '干扰' is used to refer to the disturbance that might affect experimental results or processes.