# Stochastic Signal Processing — An Introductory Textbook

> Interactive textbook for processing random signals with practical experiments. (iPhone/iPad app by Ian Young.)

- Source: https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179 (this page in markdown: same URL + `.md`)
- Developer: [Ian Young](https://appshunter.io/developer/1450268178)
- Category: Education, Books
- Price: Free
- Rating: 4.60/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 71 MB
- Languages: American English
- Released: 2019-02-01
- Data updated: 2026-07-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179/reviews.md

## What is Stochastic Signal Processing?

Speech, music, seismic vibrations, oil prices, and climate measurements are all examples of stochastic (random) signals. In this textbook—intended for individuals with prior training in introductory signal processing and introductory probability theory—we develop techniques to process such signals to extract useful information. We present case studies ranging from music to photographic images to oil prices to climate data to the motion of individual biomolecules. This textbook, as an interactive textbook ("iBook"), makes use of your device's ability to display dynamic information through films and animations and to hear the results of the techniques applied to music. At the end of every chapter there are homework problems ranging from easy to "olympic".

A new and exciting aspect is that we make use of your device's interactive capabilities to offer 59 laboratory experiments in signal processing. The experiments use the camera, the microphone, the speakers, and the graphical user interface. These experiments are not simulations; they are examples of real digital processing of signals in your device. In this time of at-home and online learning, this is the way to learn signal processing through study and experimentation.

## Key features

- Interactive textbook format
- Dynamic information display
- Films and animations
- 59 laboratory experiments
- Real-time signal processing
- Homework problems

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/stochastic-signal-processing/id1450268179/reviews.md

### 3/5 — Displayed Info Stuck in Landscape Mode

*2021-04-18*

After rotating smartphone to landscape mode, the displayed info would not return to portrait mode. Restarting device did not resolve problem. Did not re-install app due to limited data available for device.

**Developer response:** On an iPhone the display is only in landscape mode. That is necessary to show certain material side-by-side. On an iPad display in both landscape mode and portrait mode is possible.  This was a choice I had to make for the iPhone. Thank you for asking about this and I hope that it will be useful to you in landscape mode.

### 5/5 — This is an excellent textbook by an excellent educator.

*2019-02-03*

Prof. I.T. (Ted) Young was, by far, the best lecturer I had the fortune of learning from during my college years. He inspired me to become an educator myself. I’m glad to see he’s still finding ways to inspire new generations of students.

This textbook provides a clear and concise exposition of stochastic signal processing as typically taught to 3rd or 4th year college students. It presents the topic in a manner that encourages thinking about the meaning behind the equations, and encourages exploration. The exercises ask all the right questions to ensure students will want to dig deep and really understand the underlying concepts.

This being a digital book, it has the advantage of including the examples and live demos you’d give during a lecture. There are audio and video snippets, as well as interactive experiments that are fun and highly instructive.

What is missing in the book is Ted’s wonderful delivery and his uncanny ability to know when to lighten the load with one of his anecdotes. You’ll have to try to catch him in a lecture room for that.

**Developer response:** Thank you; I’m blushing.

### 5/5 — The best!

*2019-02-02*

If you’re looking for stochastic signal processing book, this is the one for you!

**Developer response:** Thank you!

## Frequently asked questions about Stochastic Signal Processing

### What is Stochastic Signal Processing?

Stochastic Signal Processing is an interactive textbook that teaches techniques to process random signals like speech, music, and climate data to extract useful information. It includes case studies and laboratory experiments.

### What are the prerequisites for using Stochastic Signal Processing?

This textbook is intended for individuals with prior training in introductory signal processing and introductory probability theory. It assumes a foundational understanding of these subjects.

### How many laboratory experiments are included in Stochastic Signal Processing?

Stochastic Signal Processing features 59 laboratory experiments that utilize your device's camera, microphone, and speakers for real digital processing of signals. These are not simulations.

### What kind of homework problems are available in Stochastic Signal Processing?

At the end of each chapter, you will find homework problems that range in difficulty from easy to challenging, described as 'olympic' level.

### What devices is Stochastic Signal Processing compatible with?

Stochastic Signal Processing is supported on iPhone, iPad, and iPod devices. It was last updated on November 26, 2025.

### Is Stochastic Signal Processing free to use?

Yes, Stochastic Signal Processing is available for free. It does not feature in-app purchases or advertisements.

### How often is Stochastic Signal Processing updated?

The latest version of Stochastic Signal Processing is 1.12.6, last updated on November 26, 2025. Updates ensure the app remains current and reliable.

### What is the age rating for Stochastic Signal Processing?

Stochastic Signal Processing has an age rating of 4+, making it suitable for a wide range of users interested in the subject matter.

## Version history (last 5 releases)

### 1.12.6 — 2025-11-26

Maintenance updates of various "under-the-hood" elements. Nothing to see here folks.

### 1.12.5 — 2025-04-30

An annoying but benign alert message introduced by the latest version of a third-party module has been eliminated without affecting the module's function. A small mistake in Chapter 7 has been corrected. My bad. The latest versions of many software support modules—under the hood—have been updated.

### 1.12.4 — 2023-08-24

• Maintenance updates of various elements. Nothing to see here folks.

### 1.12.3 — 2022-02-25

• The text describing the Schrödinger’s cat problem (4.2) has been improved.
• Maintenance updates of various libraries. Nothing to see here folks.

### 1.12.2 — 2021-12-02

• Improved compatibility with a number of platform devices
• Under the "hood" maintenance improvements.

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## Related topics

[signal processing](https://appshunter.io/ios/topics/signal-processing) · [stochastic signal processing](https://appshunter.io/ios/topics/stochastic-signal-processing) · [processing](https://appshunter.io/ios/topics/processing)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-05.*