Update README.md

README.md

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 ### Dataset Summary
 
-The data is collected in 66 rooms, 2-4 point locations in each room. According to the relative position of the sound source and the point, 2-5 sets of data are collected for each point. The valid time is 20 hours. The data is recorded in a wide range and can be used for smart home scene product development.
+This dataset is just a sample of Microphone Collecting Radio Frequency Noise Data(paid dataset).The data is collected in 66 rooms, 2-4 point locations in each room. According to the relative position of the sound source and the point, 2-5 sets of data are collected for each point. The valid time is 20 hours. The data is recorded in a wide range and can be used for smart home scene product development.
                            
-For more details, please refer to the link: https://www.nexdata.ai/datasets/speechrecog/34?source=Huggingface
+For more details & to download the rest of the dataset(paid),please refer to the link: https://www.nexdata.ai/datasets/speechrecog/34?source=Huggingface
 
 
 ### Supported Tasks and Leaderboards