Rain sound signal noise reduction processing method and system

Abstract

The invention discloses a rain sound signal noise reduction processing method which comprises the steps that real-time sound signals during rainfall are collected, and the real-time sound signals at least comprise the real-time rain sound signals; and a rain-sound separation subsystem is used for removing a real-time first ambient sound signal and a real-time second ambient sound signal from the mixed sound signal, and a rain-sound signal which does not contain the ambient sound signal is seperated from the real-time sound signal, wherein the ambient sound signal comprises a first ambient sound signal and a second ambient sound signal. According to the method, a fixed point algorithm (Fast ICA) algorithm in an independent component analysis (ICA) algorithm is adopted; the rain-sound separation subsystem is established, separation matrix parameters are optimized, real-time sound signals during rainfall are imported into the rain-sound separation subsystem, the environmental sound signals are removed, relatively pure rain-sound signals are exported, and the rainfall level is judged according to the frequency spectrum of the exported rain-sound signals.

Description

technical field [0001] The present invention relates to the technical field of rain sound signal processing, in particular to a rain sound signal noise reduction processing method and system. Background technique [0002] Precipitation plays a vital role in the earth's water cycle, and the amount of precipitation directly affects the balance of the global atmospheric hydrological system. my country's climate is diverse, especially the monsoon climate, which is characterized by sudden torrential rains. Except for some provinces in the northwest, other regions will basically experience torrential rains. Therefore, torrential rain has become the main weather disaster in our country. The flood season from April to October every year causes huge losses to the economy of our country. The measurement of precipitation plays a vital role in today's meteorology and hydrology, and rain gauges are generally used as measurement tools. The most common rain gauges on the market are dire...

AI Technical Summary

Problems solved by technology

These two types of rain gauges have relatively strict environmental requirements. In addition to being unable to measure when the wind is too strong, if the temperature is below 0 degrees Celsius, the funnels of the siphon rain gauge and the tipping bucket rain gauge are easy to freeze Formation of blockage, resulting in excessive error in measurement results

Because of the need to collect rainwater for measurement, these rain gauges need to be placed directly outdoors. In Qinghai and other provinces that are located on plateaus and have large uninhabited areas, manual calibration and maintenance become difficult.

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