Apparatus and method for recognizing horn using sound signal processor

A method for recognizing a horn using a sound signal process, comprising:

• acquiring, by a processor, and storing surrounding sound data using a microphone;
• sampling, by the processor, a sound signal within the sound data;
• performing, by the processor, signal conversion on frequencies of the sampled sound signal;
• defining and extracting, by the processor, frequency signals which exhibit horn sound characteristics from the converted frequency signals;
• combining, by the processor, the extracted frequency signals;
• accumulating, by the processor, the combined frequency signals over time;
• digitizing, by the processor, a change rate of the accumulated frequency signals;
• and
• determining, by the processor, whether the digitized change rate of the frequency signals is equal to or greater than a threshold value to determine whether and when a horn is generated.

A non-transitory computer readable medium containing program instructions executed by a processor, the computer readable medium comprising:

• program instructions that acquire and store surrounding sound data from a microphone;
• program instructions that sample a sound signal within the sound data;
• program instructions that perform signal conversion on frequencies of the sampled sound signal;
• program instructions that define and extract frequency signals that exhibit horn sound characteristics from the converted frequency signals;
• program instructions that combine the extracted frequency signals;
• program instructions that accumulate the combined frequency signals over time;
• program instructions that digitize a change rate of the accumulated frequency signals;
• and
• program instructions that determine whether the digitized change rate of the frequency signals is equal to or greater than a threshold value to determine whether and when the horn is generated.