| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for improving the sound environment in a habitable room of collective housing.SOLUTION: An external sound introduction system 10 includes: a microphone 11 for external sound collection installed on an external wall or roof floor 2 of collective housing 1; a speaker 15 that is installed in a habitable room 3 of the collective housing 1 and reproduces the sound collected by the microphone 11 for external sound collection; and a sound volume adjusting device 14 for adjusting the sound volume of the speaker 15 to a preset level. Using the external sound introduction system 10, a frequency characteristic that does not make a resident feel discomfort is added to an external sound that is collected by the microphone 11 for external sound collection and occurs around the collective housing 1, and the volume of the external sound is adjusted to an appropriate volume that does not make the resident feel noisiness and is introduced to the habitable room 3. |
