▎ 摘　　要

NOVELTY - Vibrating membrane comprises a silicone rubber membrane layer, the silicone rubber membrane layer contains a network polymer, the network polymer includes a first segment is silica compound (I) and a second segment is cyanide compound (II). USE - Vibrating membrane for a sounding device. ADVANTAGE - The vibrating membrane for a sounding device has improved the oil resistance of vibrating diaphragm material through introducing nitrile group in the netted polymer of silicon rubber rate. DETAILED DESCRIPTION - Vibrating membrane comprises a silicone rubber membrane layer, the silicone rubber membrane layer contains a network polymer, the network polymer includes a first segment is silica compound of formula (I) and a second segment is cyanide compound of formula (II), where R1= methyl, ethyl, trifluoropropyl or phenyl; and R2= H, methyl, ethyl, trifluoropropyl or phenyl. INDEPENDENT CLAIMS are included for: a method for preparing vibrating film of a sounding device, which involves: i. using silicone rubber as a base polymer, adding nitrile-containing rubber, fillers and auxiliary agents to the base polymer, and mixing to obtain a mixed material; vulcanizing the mixture material at high temperature to obtain the silicone rubber film layer of the vibrating film, where the silicone rubber is a straight-chain random polymer with a main chain composed of segment one and/or segment three and terminated by side chain groups, and the segment one is silica compound of formula (I) and third segment is silica compound of formula (IV), R4 = methyl, ethyl, trifluoropropyl or phenyl; and a sound device, having a vibration system and a magnetic circuit system matched with the vibration system, the vibration system includes a diaphragm and a voice coil (20) combined on one side of the diaphragm, and the magnetic circuit system drives the voice coil to vibrate to drive the vibration, the vibrating membrane emits sound. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a sound generating device. 10Vibrating membrane 11Folded ring portion 12Ball top 20Voice coil