Ultrasonic devices (sonic mosquito repellent) operate by emitting short wavelength, high frequency sound waves too high in pitch to be heard by the human ear (mosquito sound). This is due to limitations in human hearing. Humans can not hear ultrasound (mosquito sound) because the eardrum does not vibrate fast enough, but some animals such as dogs, bats and rodents can hear well into the ultrasonic range. Some insects, such as grasshoppers and locusts can detect frequencies from 50,000 Hz to 100,
iAnalyzer is a FFT based professional software to analyze the audio signal for iPhone and iPod Touch. Features: High performance software design for Real Time Analyzing(RTA) and complex graph displaying. Works on 44K sample rate, 20~20k Hz frequency output. FFT spectrum and 3D Octave display. Colored curve depend on the dB value. -Mix 2D&3D display. High precision peak frequency computation(average-error < 0.1%). Frequency to music scale converter.
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