Directional keyword verification method applicable to electronic device and electronic device using the same

An electronic device comprising:

• at least two microphones;
• and
• a processor indirectly coupled to the at least two microphones and is configured at least for:
• receiving, by using the at least two microphones, the first audio stream within a predefined angle and eliminating noise from any direction which is not within the predefined angle, wherein the processor is configured at least for receiving the first audio stream comprising:
• capturing the first audio stream by using at least two microphones;
• applying an echo cancellation procedure to the first audio stream;
• and
• applying an automatic gain control (AGC) to the first audio stream to generate a gain adjusted first audio stream that is within a predetermined power level;
• analyzing the first audio stream to obtain a first word;
• determining whether the first word matches a first keyword from a keyword database;
• assigning the first word as belonging a first category in response to the first word being determined as not matching the first keyword from the keyword database;
• determining whether a vowel pattern of the first word matches the vowel pattern of the first keyword in response to the first word being determined as matching the first keyword from the keyword database;
• assigning the first word as belonging to a second category in response to the vowel pattern of first word being determined as matching the vowel pattern of the first keyword;
• and
• assigning the first word as belonging to the first category in response to the vowel pattern of first word being determined as not matching the vowel pattern of the first keyword.