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  1. C

    Simple Low Frequency Sound Generator

    Agreed. So would the schematic that @kellys_eye posted be a sufficient starting point to change according to the output I need?
  2. C

    Simple Low Frequency Sound Generator

    I will also add that the speaker is making direct contact with the forehead, so using sealed ear couples isn’t an option for this project.
  3. C

    Simple Low Frequency Sound Generator

    Thanks so much for all the info. I will definitely invest in a SPL meter. So if currently it’s pressed against the skull, but is not loud enough, is the agreed solution to just use a larger speaker with more voltage? I’m not sure what the current decibal level is, but at max volume from my...
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    Simple Low Frequency Sound Generator

    Also, going back to the power draw. How loud could I get it off of a 9V battery? The device is handheld so 24 AA batteries would be unrealistic for the design. I'm guessing that the max voltage that my phone is outputting to the headphone jack is around 2V? Is that why the 3W speaker isn't...
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    Simple Low Frequency Sound Generator

    Everyone, I apologize for my vagueness. I have signed an NDA for the project I am working on so I this is why I have been limited on the info about it. It is a medical device. The current prototype sends 128 Hz frequency to the head of the individual using the product. The 128 Hz resonates well...
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    Simple Low Frequency Sound Generator

    The end product in mind is to have a small 3-4 in. diameter speaker that will produce a constant 128 Hz frequency that operates on a disposable battery. The current prototype is a 3 watt speaker that is plugged into a device with a 3.5mm jack. I have to run a frequency audio generator on my...
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    Simple Low Frequency Sound Generator

    Sinusoid Waveform
  8. C

    Simple Low Frequency Sound Generator

    All I need is to output 128 Hz from a small 10 watt speaker.
  9. C

    Simple Low Frequency Sound Generator

    Hey hope everyone is well. I’m trying to build a small frequency generator that outputs through a 10W speaker. I need it to output exactly 128 Hz. I’ve done a bit of research, and from my understanding I need an oscillator. What is the most simple way to build this on a breadboard? Where...
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