Headphones

A headphone, comprising:

• a first acoustic wave generation structure;
• an acoustic transmission structure configured to transmit a first acoustic wave generated by the first acoustic wave generation structure to a spatial point outside the headphone, wherein
• the first acoustic wave generates a resonance having a resonant frequency under an action of the acoustic transmission structure;
• and
• a filtering structure configured to absorb, in a target frequency range, the first acoustic wave transmitted through the acoustic transmission structure to reduce an amplitude of an acoustic wave generated by the headphone at the spatial point, wherein the target frequency range includes the resonant frequency, wherein the filtering structure includes a perforated plate structure.

A headphone, comprising:

• a loudspeaker;
• a housing, configured to accommodate the loudspeaker, including a first sound guiding hole and a second sound guiding hole acoustically connected with the loudspeaker, respectively, wherein
• the loudspeaker outputs acoustic waves with a phase difference through the first sound guiding hole and the second sound guiding hole;
• and
• a filtering structure, provided in an acoustic transmission structure between the first sound guiding hole or the second sound guiding hole and the housing loudspeaker, configured to absorb an acoustic wave in a target frequency range, wherein the target frequency range is in a range from 1 kHz to 10 kHz, wherein the filtering structure includes a perforated plate structure.