To create a specific chosen frequency sound wave that is 180 degrees out of phase, you can use an audio signal generator and an audio mixer or phase inverter. Here's a step-by-step guide:
Obtain an audio signal generator: You will need a device or software capable of generating an audio signal at the desired frequency. This can be a standalone audio signal generator, a computer software application, or even a smartphone app.
Set the desired frequency: Configure the audio signal generator to produce the specific frequency you want. Most signal generators allow you to select the frequency and waveform type, such as sine, square, or triangle waves.
Split the audio signal: Use an audio mixer or a Y-splitter cable to split the audio signal into two separate paths.
Invert the phase of one path: In order to achieve a 180-degree phase shift, you need to invert the phase of one of the audio signals. This can be done using a phase inverter or a phase-reversal cable.
Combine the signals: Merge the two audio signals back together, making sure to connect the in-phase signal and the 180-degree out-of-phase signal appropriately.
Listen to the combined output: Connect the combined signals to a speaker or audio output device, and you should hear the resulting sound wave with the desired frequency and a 180-degree phase shift.
It's worth noting that achieving a precise 180-degree phase shift can be challenging, and the effectiveness may depend on the specific equipment and components used. Additionally, the audio mixer or phase inverter should be capable of handling the desired frequency range without introducing distortion or phase anomalies.