Today, 07:00 AM Good day to everyone im a newbie here and i just want to ask on how to make a Noise canceling Headphone that is not too expensive Im going to use it in my project My project is to make a a hearing test device that does not need an assistance of a specialist/doctor Based on my research, doctors used a sound proof room to avoid noise interference and my idea is to make a headphone that can eliminate noise I also want to ask if you know programs like MatLab that produces a sound with an accurate frequency that is not PC based and can be used without PC I dont know if i could use a micro controller