After the ceremony, a celebratory meal takes place. 1  At the birkat hamazon, additional introductory lines, known as Nodeh Leshimcha, are added. These lines praise God and request the permission of God, the Torah, Kohanim and distinguished people present to proceed with the grace.
Top 10 unbelievable historical concurrencies. Sound insulation is the process of soundproofing an enclosed space, such as a room. This type of insulating activity is usually employed when there is a need to keep sound from filtering into or out of the space.
Audible Sound. Usually sound is used to mean sound which can be perceived by the human ear, i.e., sound refers to audible sound unless otherwise classified. A reasonably standard definition of audible sound is that it is a pressure wave with frequency between 20 Hz and 20,000 Hz and with an intensity above the standard threshold of hearing.