樓上發出躁音

1. The answer is mostly no. The disturbance of noise can be categorized into 2 kinds: sound that you don't feel comfortable to hear, or the volume of the sound.

The problem with using a mobile phone is there is no way to tell the origin of the sound (as well as how bad the sound is). The best solution is taking a video of your home with the noise at the background. The video should capture the volume of noise (in decibel (dB)) displayed by a measuring instrument as well.

2. Injunction is a fairly complicated legal proceeding.

Therefore, it is best to hire a lawyer to do so.

錄音冇用架，覺得滋擾係你自己，其他人感受唔到，你可投訢管理處或報警處理。