Filter- equipping megaphone

• Main Author: NAOZUMI, MATSUMOTO
• Format: Patent
• Language: Chinese; English
• Published: 01.02.2022
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PHYSICS; SOUND-PRODUCING DEVICES

A filter- equipping megaphone is provided, with megaphone and filter. The filter can be detachably contained and located at or adjacent to the small diameter part of the mouth piece of the megaphone. The megaphone body and the mouth piece structure formed by the megaphone can be detachably combined....