Abstract: In a demand level calculation apparatus (20) of the present invention, the advertisement information acquisition unit (21) acquires advertisement information on at least one of an advertising target product or an advertising target service in a specific area of a real space, the coordinate information generation unit (22) generates coordinate information associated with a fiducial marker installed in the specific area, and maps a virtual point indicating a specific position in the specific area on the coordinate information, and associates the virtual point with the advertisement information, the visitor information acquisition unit (23) acquires visitor information including attribute information and behavior information of a visitor in the specific area, and the demand level calculation unit (24) calculates a magnitude of a demand level for the advertisement information based on the advertisement information and the visitor information.

Abstract: In an advertisement information generation apparatus (30) of the present invention, the advertisement information generation unit (31) generates advertisement information on at least one of an advertising target product or an advertising target service, the coordinate information acquisition unit (32) acquires coordinate information associated with a fiducial marker installed in a specific area of a real space, a virtual point indicating a specific position in the specific area is mapped on the coordinate information, the virtual object generation unit (33) generates a virtual object associated with the virtual point and the advertisement information, the virtual object is composed of a main object and a sub object, the main object is an image object representing contents of the advertisement information, and the sub object is an object to which text information representing the contents of the advertisement information is added.

Abstract: The muffler comprises a main sound arresting chamber formed in the interior of an outer cylinder of the muffler and a bracket fixedly secured to the outer surface of the outer cylinder for mounting the muffler on a body of a motorcycle. The muffler is provided with an auxiliary sound arresting chamber formed in the interior of the bracket and communicating with the main sound arresting chamber through a connecting passage so as to increase the total volume of the sound arresting chamber, thereby permitting the output of the engine of the motorcycle to be enhanced while the sound arresting effect on the exhaust gas is improved. The main sound arresting chamber may be divided into an upstream side main sound arresting chamber portion and downstream side main sound arresting chamber portions by partition means and the auxiliary sound arresting chamber portion communicates with the upstream main sound arresting chamber portion. The connecting passage may be in the form of a plurality of small diameter holes.