Why did the old Shanghai phonograph use the trumpet flower shape?

For the sake of beauty. The phonograph in old Shanghai used a stylus to rub the sound of a record, but the sound was small and needed a megaphone to increase the volume. For the sake of beauty, the phonograph is designed as a morning glory, which is both beautiful and practical. The phonograph is an electric device for playing records, which was invented by American inventor Edison 1877.