Earphone and loudspeaker

The utility model relates to an earphone and a loudspeaker. The earphone comprises a wall body, the loudspeaker and a cavity cover. The wall body is provided with an output port. The loudspeaker is accommodated in the wall body, and the sounding end of the loudspeaker is provided with a sound outlet hole. The cavity cover is accommodated in the wall body and covers the sound production end of the loudspeaker. The outer periphery of the cavity cover is arranged around the periphery of the sound outlet hole. At least part of the surface, facing the sound production end, of the cavity cover is recessed in the direction away from the sound production end and forms a front cavity. An outer cavity is formed between the surface, back to the sound production end, of the cavity cover and the inner surface of the wall body. The outer chamber is communicated with the output port. And the volume of the front chamber is smaller than that of the outer chamber. The cavity cover is provided with a first through hole communic