9. An electronic device, comprising: a sound sensor configured to receive an input sound; a speech detector configured to detect speech spoken by a user in the input sound; a frequency analyzer configured to determine first characteristics of an identified first frequency range of the speech and second characteristics of an identified second frequency range of the speech in response to detecting the speech, the second frequency range differing from the first frequency range; a processor including a speech direction determiner configured to determine, based on the first characteristics and based on the second characteristics, whether a direction of departure of the speech is toward the electronic device, the processor configured to recognize a command in the speech based on an indication of speech direction detection; and circuitry configured to initiate a function associated with the recognized command at the electronic device in response to a determination that the direction of departure of the speech is toward the electronic device based on the first characteristics and based on the second characteristics.
9. An electronic device, comprising: a sound sensor configured to receive an input sound; a speech detector configured to detect speech spoken by a user in the input sound; a frequency analyzer configured to determine first characteristics of an identified first frequency range of the speech and second characteristics of an identified second frequency range of the speech in response to detecting the speech, the second frequency range differing from the first frequency range; a processor including a speech direction determiner configured to determine, based on the first characteristics and based on the second characteristics, whether a direction of departure of the speech is toward the electronic device, the processor configured to recognize a command in the speech based on an indication of speech direction detection; and circuitry configured to initiate a function associated with the recognized command at the electronic device in response to a determination that the direction of departure of the speech is toward the electronic device based on the first characteristics and based on the second characteristics. 16. The electronic device of claim 9 , further comprising: an antenna; and a receiver coupled to the antenna and configured to receive a signal corresponding to a particular input sound.