![]() ![]() The results show that the proposed system could construct a three-dimensional indoor noise map by combining the sound information and the positional information. Finally, a preliminary experiment was conducted to construct a simple three-dimensional noise map in a large experimental room. A correct calculation is possible if we replace the mapping of a virtual plane at a fixed distance by different measurement distances to individual points at a. Next, the acoustical effects of a blimp, such as reflection and diffraction, were measured to decide the microphone position. First, the propeller rotational noises of the proposed system were compared to a general recreational-use multirotor. To evaluate our system, three experiments were conducted. This allows caves and such formations, where the ground height is not a single value for given 2D location. Instead he has a 3D grid, where any cell can be empty. Furthermore, the simultaneous localization and mapping (SLAM) technique is applied for the system's positional tracking and surrounding spatial mapping with a stereo camera. 2D perlin noise is good for height maps, but in this case it seems that he is not using a height map. The proposed system achieved a silent, slow, and omnidirectional movement with a balloon filled with helium gas. Herein, a noise and spatial mapping system with a blimp robot is proposed. Although it could be applied to acoustic measurements, it causes loud noise as it must always rotate its propellers during flying. In recent years, with advances in unmanned aerial vehicle (UAV) technology, a multirotor aircraft has been frequently used as general use. However, these systems are costly because many measurement points are required to construct a detailed and three-dimensional noise map. To measure environmental noises, many noise measurement and mapping systems have been studied. ![]()
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January 2023
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