A study of cone movement and vibration in designing an alternative speaker using reed vibrations

• Main Authors: Austriaco, Christine M., De Guzman, Anthony M., De Guzman, Michael Glenn M.
• Format: text
• Language: English
• Published: Animo Repository 1994
• Subjects: Loudspeakers; Sound > Transmission; Electroacoustic transducers; Vibration; Signal processing > Digital techniques; Elastic waves; Engineering design; Speakers (Loudspeakers)
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/8202
• Institution: De La Salle University

Before the 20th century, there were no loudspeakers to produce sound, only pick-ups, needles and flare horns. This went on until the 1920s, when discoveries were made in recording and reproducing sound through electrical means. This later developed into what we now know as transducers.Loudspeakers, which are also known as electroacoustic transducers, are considered the most effective and accurate means of reproducing sound. Immediately associated to it is the cone and coil speaker structure. This structure consists of a light elliptical cone or diaphragm freely suspended from a metal frame by fringy suspensions. Firmly attached to the center of the cone is the cylindrical former and voice-coil, both of which are positioned between the poles of a magnet. In early loudspeakers, electromagnets were used instead of permanent magnets.Since the cone speaker have been regarded as very efficient and economical in the field of sound reproduction, finding alternative ways of reproducing sound have been given less attention. In view of this, the idea of exploring another means of reproducing sound seemed an appropriate topic for a thesis.The aim of this thesis is to produce an alternative design for a speaker which focuses on reed vibrations alone. Having known in the past that reeds have been the core of sound reproductions in organ pipes and some other wind instruments, then perhaps its usage may also be extended to loudspeakers. By making this reed vibrate similarly to that of a cone in a typical electroacoustic transducer, comparisons may be drawn and as such, significant conclusions maybe arrived at. From experiment results, it is hoped that sufficient observations can be further presented to be able to produce a solid analysis and recommendation.