GRAZING HAVING EXCELLENT VIBRATION ACOUSTIC ATTENUATION BEHAVIOR, MANUFACTURING METHOD OF SUCH GRAZING, AND ACOUSTIC PROTECTION METHOD OF VEHICLE CABIN

摘要

PROBLEM TO BE SOLVED: To provide a laminate grazing unit or a grazing unit including vibration acoustic attenuation means such as a connecting seal of the outer periphery of the grazing unit at a high frequency.SOLUTION: A grazing unit (1) includes at least one glass plate (10) and at least one vibration acoustic attenuation section (2) fitted to at least one surface of the glass plate and having at least one garment (20) made of an attenuation material of a loss coefficient larger than 0.2, and has an improved vibration acoustic attenuation behavior. The grazing unit is characterized in that the section (2) is not combined with any other device on the opposite side of the glass plate, and the garment made of the attenuation material has, at 20°C, Young's modulus higher than 800 MPa for a specific frequency corresponding to the critical frequency of the grazing within the range of ±30%.SELECTED DRAWING: Figure 1