We are working on a project which allows us to record some sounds from a microphone with a 5k Hz sample rate with some Low-Pass filter & HighPass filter. What we are using We are using AvaudioE...

I need to implement a lowpass filter in Python, but the only module I can use is numpy (not scipy). I tried using np.fft.fft() on the signal, then setting all frequencies which are higher than the ...

I have a pandas.DataFrame indexed by time, as seen below. The other column contains data recorded from a device measuring current. I want to filter to the second column by a low pass filter with a ...

I have an app which uses orientation data which works very well using the pre API-8 method of using a Sensor.TYPE_ORIENTAITON. Smoothing that data was relatively easy. I am trying to update the co...

I essentially have an array of values like this: 0.25, 0.24, 0.27, 0.26, 0.29, 0.34, 0.32, 0.36, 0.32, 0.28, 0.25, 0.24, 0.25 The above array is oversimplified, I'm collecting 1 value per millis...

I have a very basic question. What is Low Pass filter and High Pass filter in case of Android Accelerometer? When I see the output from the Accelerometer Sensor, I see If I don't use any filter, ...

I implemented a simple low pass filter in matlab using a forward and backward fft. It works in principle, but the minimum and maximum values differ from the original. signal = data; %% fourier spe...

I am using the device accelerometer and try to smooth the Accelerometer Data CMAcceleration. I am doing this with help of this code: -(void)proccessAccelerometerData:(CMAcceleration)accelData { ...

I am working on an App for the iPad, and I want to analyze the Audio from a Video that I am playing. This is all going well, using the MTAudioProcessingTap. Currently I have some test code to test/...

I am new in signal processing, and I didn't find Python code with good explanation. So I will be glad to get a simple explanation. I have some signal that sampled each 1 nsec (1e-9 sec) and have, l...

I have implemented a rudimentary low-pass filter using a time based value. This is ok, but trying to find the correct time slice is guess work, and gives different results based on different input ...