噪声计/SPL Meter app for iPhone and iPad

噪声计是公众声景感知研究项目的客户端应用软件。该软件能够根据A声级计算方法对环境噪声进行实时测量与评价，能够实时频谱分析显示，给出环境噪声的最大声压级、主要声源的频率，具备中英双语支持。同时软件能够在用户的帮助下进行声源的辨析，声音大小、声音舒适度、声音协调度的评价，等效连续A声级的计算，测量结果的进行上报和分享，促进科学家对城市声环境的研究。

SPL Meter is a mobile application for Participatory soundScape Sensing. The application can measure sound pressure level, analyze the sound spectrum, has Chinese and English languages. It also has subjective evaluation features, including the sound source identification, the evaluation of sound level, sound comfort level and harmonious level. Moreover, the users can share measurement results with scientists to promote urban sound environment research.