Are the Tasbeehaat of Ruku and Sajdah to be Recited Audibly or Not?

Q: Salaah-229: It is the habit of some people to recite the Thanaa, the Tasbeehaat of Ruku and Sajdah, the Takbeeraat, the Tashahhud, the Durood and the du'aa afterwards so loudly that those around are bound to be disturbed and make mistakes. This they do in the Fardh as well as other salaahs. What is the ruling in this regard?

Answer: It is not only wrong but actually sinful to recite the Tasbeehaat or even to recite the Qur'aan or to make Dhikr in a manner that disturbs the concentration of a person performing salaah or makes him err. Similarly, it is also sinful if it disrupts the concentration and solitude of a person in I'tikaaf or if it disturbs a sleeping person. Such a habit must therefore be dropped. And Allaah knows best what is most correct.

Fatawa Rahimiyyah vol.2