amirahmadian
Member level 1
Hi everybody.
I need to build a ultrasonic transmitter and a receiver for my project (The ultrasonic wave must be at a frequency about 30kHz). I wonder if I make a simple circuit that generates a 30kHz sine wave and I feed a typical loudspeaker with this signal, will it transmit ultrasonic waves? Or I have to use some special devices as the transmitter?
And what about the receiver? Can I use a typical microphone as the sensor of my receiver (And I would use a bandpass filter to detect my desired signal)?
Please help.
I need to build a ultrasonic transmitter and a receiver for my project (The ultrasonic wave must be at a frequency about 30kHz). I wonder if I make a simple circuit that generates a 30kHz sine wave and I feed a typical loudspeaker with this signal, will it transmit ultrasonic waves? Or I have to use some special devices as the transmitter?
And what about the receiver? Can I use a typical microphone as the sensor of my receiver (And I would use a bandpass filter to detect my desired signal)?
Please help.