초록 ▼

A portable audible beacon comprises a housing that encloses a signal generating means and an acoustic transducer. The signal generating means generates an oscillating signal that is periodically interrupted by a zero signal, where the fundamental frequency of the oscillating signal corresponds to a

A portable audible beacon comprises a housing that encloses a signal generating means and an acoustic transducer. The signal generating means generates an oscillating signal that is periodically interrupted by a zero signal, where the fundamental frequency of the oscillating signal corresponds to a frequency of high auditory sensitivity to the human ear, where the frequency of interruption of the oscillating signal corresponds to a directionally discernible frequency to the human ear, and where the period of duration of each zero signal is less than or about the same as the period of duration of the oscillating signal between each zero signal. The acoustic transducer receives the signal from the signal generating means and converts it into sound. The portable audible beacon of the present invention achieves the combined advantages of power efficiency, auditory sensitivity, and directionality.

대표청구항 ▼

[ I claim:] [1.] A portable audible beacon comprising:a housing;a signal generating means mounted in the housing for generating an oscillating signal that is periodically interrupted by a zero signal, where the fundamental frequency of the oscillating signal corresponds to a frequency of high audito

[ I claim:] [1.] A portable audible beacon comprising:a housing;a signal generating means mounted in the housing for generating an oscillating signal that is periodically interrupted by a zero signal, where the fundamental frequency of the oscillating signal corresponds to a frequency of high auditory sensitivity to the human ear either greater than or equal to 2000 Hz, where the frequency of interruption of the oscillating signal corresponds to a directionally discernible frequency to the human ear less than 2000 Hz, and where the period of duration of each zero signal is either less than or about the same as the period of duration of the oscillating signal between each zero signal; andan acoustic transducer mounted in the housing for receiving the signal generated by the signal generating means and for converting it into sound.