Hello, for my final school project I am making a system that can detect the location of a device via ultrasonic soundwaves. To do this the device has to have some ultrasonic transducers that can emit a pulse in every direction. I had trouble finding such transducers where I live that arent super expensive so my plan is to use the transducers from a HC-SR04 sensor.
The only problem is that these only have a transmitting angle of around 30 degrees. This means I would have to use a lot of these to cover every direction. So my question is this: is there a way to increase the angle of transmission and reception of these transducers? I thought about removing the aluminium hull but I am not sure if this will work. Any advice would be greatly apprieciated!
p.s. alternatives are also welcome