#antifon

• Antiphon — A material, device, or chemical compound used for soundproofing, noise reduction, or acoustical vibration damping (especially in automotive or construction industries); in Christian liturgical music (theology), it represents a hymn, verse, or psalm sung alternatively by two separate choirs.
• To soundproof — To apply a layer of soundproofing compound, bituminous mastic, or other acoustic insulating material onto a surface (especially on a vehicle chassis or structural construction components) in order to reduce noise, damp acoustic vibrations, and provide anti-corrosive protection.
• Antiphonary — A liturgical book used in the Christian Church (especially in the Roman Catholic and ancient Byzantine traditions) containing the antiphons, verses, psalms, and hymns designated to be sung alternatively by two choirs throughout the liturgical year.
• Soundproofing — The act of soundproofing and its result; the technical process of applying an acoustic insulating layer, bituminous mastic, or sound-absorbing material onto a surface to diminish noise, damp mechanical vibrations, and provide an effective barrier against corrosion.
• Soundproofed — Covered with a layer of soundproofing compound or acoustic insulating materials to prevent the propagation of noise and vibrations; as a neuter noun, it designates the completed work, result, or process of insonorizing a surface or vehicle.
• Antiphonal — Insulating against noise or damping sound vibrations; pertaining to soundproofing or acoustic reduction. In liturgical or religious music (theology), the term describes a hymnal structure or a mode of vocal performance based on the symmetrical alternation and dialogue between two separate choirs.
• Antiphony — A system of musical or liturgical performance characterized by the alternate singing of two choirs or a soloist and a choir responding successively; a genre of church chant based on this dialogue structure, used since antiquity and consolidated in Byzantine and Gregorian liturgies.
• Hearing protector — Personal protective equipment designed to attenuate ambient noise levels and protect the auditory system against acoustic traumas; ear protector. As an adjective, it describes a device, soundproofing material, or substance capable of diminishing harmful acoustic wave intensity.