What is the ruling on using loudspeakers in cemeteries to supplicate for the deceased after burial?

Supplicating for the deceased after burial is from the Sunnah, and each person should do so individually. The general rule for supplication is not to raise one's voice with it. Therefore, loudspeakers should not be used in this situation, based on the words of the Messenger of Allah, peace and blessings be upon him: "Be easy on yourselves, for you are not supplicating one who is deaf or absent. You are supplicating one who is All-Hearing, Ever-Near, and He is with you."