I want to make a audible (beeping) variometer like you use it for (para)gliding. I want to have a very sensitive one, so noise, filtering and averaging will be a challenge.
At the moment I'm on the hardware part. The lower the noise and higher the accuracy, the easier the filtering. I have some standard BMP085 laying arround, but they seem too cheap for the quality I'm seeking.
What sensors can you recommend to me for my application?