An acoustic input and output apparatus configured to be head-worn by a user, the acoustic input and output apparatus comprising: a loudspeaker assembly configured to convert audio signals into mechanical vibrations; a sound-pickup assembly configured to pick up a sound signal; and a connection assembly including an elastic member, wherein a first end of the elastic member connects to the loudspeaker assembly, and a second end of the elastic member connects to the sound-pickup assembly, wherein the elastic member includes an elastic connecting rod, the elastic connecting rod includes an elastic metal filament and plug-in parts connecting to two ends of the elastic metal filament, respectively, one of the plug-in parts is configured to match and plug in the sound-pickup assembly, and the other one of the plug-in parts is configured to match and plug in the loudspeaker assembly; and the elastic metal filament is configured as a skeleton of the elastic connecting rod to support the elastic connecting rod to form a fixed shape, an elastic modulus of the elastic metal filament is 70 Gpa to 90 Gpa; at least part of the mechanical vibrations generated by the loudspeaker assembly are transmitted to the sound-pickup assembly; and the elastic member is configured to cause an average amplitude attenuation rate of the mechanical vibrations generated by the loudspeaker assembly to be larger than or equal to 35% in a process that the mechanical vibrations transmit from the first end connected to the loudspeaker assembly to the second end connected to the sound-pickup assembly. a loudspeaker assembly configured to convert audio signals into mechanical vibrations; a sound-pickup assembly configured to pick up a sound signal; and a connection assembly including an elastic member, wherein a first end of the elastic member connects to the loudspeaker assembly, and a second end of the elastic member connects to the sound-pickup assembly, wherein the elastic member includes an elastic connecting rod, the elastic connecting rod includes an elastic metal filament and plug-in parts connecting to two ends of the elastic metal filament, respectively, one of the plug-in parts is configured to match and plug in the sound-pickup assembly, and the other one of the plug-in parts is configured to match and plug in the loudspeaker assembly; and the elastic metal filament is configured as a skeleton of the elastic connecting rod to support the elastic connecting rod to form a fixed shape, an elastic modulus of the elastic metal filament is 70 Gpa to 90 Gpa; at least part of the mechanical vibrations generated by the loudspeaker assembly are transmitted to the sound-pickup assembly; and the elastic member includes an elastic connecting rod, the elastic connecting rod includes an elastic metal filament and plug-in parts connecting to two ends of the elastic metal filament, respectively, one of the plug-in parts is configured to match and plug in the sound-pickup assembly, and the other one of the plug-in parts is configured to match and plug in the loudspeaker assembly; and the elastic metal filament is configured as a skeleton of the elastic connecting rod to support the elastic connecting rod to form a fixed shape, an elastic modulus of the elastic metal filament is 70 Gpa to 90 Gpa; at least part of the mechanical vibrations generated by the loudspeaker assembly are transmitted to the sound-pickup assembly; and the elastic member is configured to cause an average amplitude attenuation rate of the mechanical vibrations generated by the loudspeaker assembly to be larger than or equal to 35% in a process that the mechanical vibrations transmit from the first end connected to the loudspeaker assembly to the second end connected to the sound-pickup assembly.