In a dry or concentrated liquid fertilizer when local water is added to dilute to a working concentration, the hardness components in the local water react with the fertilizer components and begin to form low-solubility salts. In the disclosed method, a computing device continuously captures frames from a set of available video feeds such as television channels. As a result, the impact of the information collection process on the application is reduced, improving the usefulness of the collected information. By expanding the bandwidth based on the noise classification information, the present technology can expand the speech bandwidth of the narrow bandwidth acoustic signal and prevent or limit the bandwidth expansion of the noise.