A locational information transmission apparatus that transmits information for identifying a location, the locational information transmission apparatus comprising: a radio communication unit that performs radio communication; a sound wave transmitting unit that transmits a sound wave including first identification information; and a radio wave transmitting unit that transmits a radio wave including second identification information; and a transmission control unit that changes, depending on control information reported via the radio communication, a method of transmitting the sound wave or a method of transmitting the radio wave, characterized in that the sound wave transmitting unit transmits the sound wave at a predetermined center frequency and the transmission control unit changes said center frequency depending on the control information, wherein the locational information transmission apparatus further comprises: a sound wave collection unit that collects surrounding sound waves around the locational information transmission apparatus , and a sound wave analysis unit that analyses the sound waves collected by the sound wave collection unit and reports the analysis result to a location management server , wherein the sound wave analysis unit measures a noise level in the vicinity of the locational information transmission apparatus and an output level for transmitting the sound wave is changed based on said noise level. a radio communication unit that performs radio communication; a sound wave transmitting unit that transmits a sound wave including first identification information; and a radio wave transmitting unit that transmits a radio wave including second identification information; and a transmission control unit that changes, depending on control information reported via the radio communication, a method of transmitting the sound wave or a method of transmitting the radio wave, characterized in that the sound wave transmitting unit transmits the sound wave at a predetermined center frequency and the transmission control unit changes said center frequency depending on the control information, wherein the locational information transmission apparatus further comprises: a sound wave collection unit that collects surrounding sound waves around the locational information transmission apparatus , and a sound wave analysis unit that analyses the sound waves collected by the sound wave collection unit and reports the analysis result to a location management server , wherein the sound wave analysis unit measures a noise level in the vicinity of the locational information transmission apparatus and an output level for transmitting the sound wave is changed based on said noise level. a sound wave collection unit that collects surrounding sound waves around the locational information transmission apparatus , and a sound wave analysis unit that analyses the sound waves collected by the sound wave collection unit and reports the analysis result to a location management server , wherein the sound wave analysis unit measures a noise level in the vicinity of the locational information transmission apparatus and an output level for transmitting the sound wave is changed based on said noise level. <EOS>