# David Koenig

### Corning Inc. (Retired)

Retired process analyst from Corning, Inc.

Professional Interests: Analysis of Vibrations and Sound

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**Content Feed**

Question

Is there a toolbox for statistical energy analysis?

I just recently became aware of a project using statistical energy analysis (SEA)to help design an improved piano soundboard. It...

9 years ago | 2 answers | 0

### 2

answersQuestion

Why does plotting nans in 3D cause problems with time and ability to save the plot?

The following script illustrates my problem - when iFloorRem=0 there is no problem with running the script and when it is finish...

9 years ago | 0 answers | 0

### 0

answersQuestion

Is mp3write missing from R2013B and R2013a?

Today I attempted use mp3write for the first time since downloading R2013a and R2013b and found that it is not there. Even the h...

9 years ago | 1 answer | 0

### 1

answerQuestion

Is there automatic gain in audiorecorder or soundsc?

I am collecting data using audiorecorder and playing it using soundsc. I collect for a fixed time - 10 seconds. I collect the re...

9 years ago | 0 answers | 0

### 0

answersQuestion

What package do I need to interface with a Roland Duo-Capture EX USB Audio Interface

Hello, I am purchasing a Roland Duo-Capture EX USB audio interface to be used to collect music sound waves. It comes bundled ...

9 years ago | 0 answers | 0

### 0

answersQuestion

How do I remove background noise from a sound wave?

I have a sound wave y(1:441000) gathered using a microphone and I have background n(1:441000) also gathered by the microphone. I...

9 years ago | 4 answers | 0

### 4

answersQuestion

How to positon the command window?

In response to a question, the following script was presented as an answer: desktop = com.mathworks.mde.desk.MLDesktop.getI...

9 years ago | 0 answers | 0

### 0

answersQuestion

How to Import Matlab Figures?

I would like to bring a *.fig into a script and perhaps do some additional things to it, as in adding a text statement. I have ...

9 years ago | 1 answer | 0

### 1

answerQuestion

What tablets are capable of downloading and running Matlab? Thanks.

I have laptops and an ACER Aspire One which are running Matlab. What tablets are capable of downloading and running Matlab. (The...

9 years ago | 1 answer | 0

### 1

answerQuestion

Numerical Integration of Equally Spaced Data

I have been using trapz to integrate a vector of equally spaced data. Is there a more accurate method available in script form t...

9 years ago | 1 answer | 0

### 1

answerQuestion

How do you speed up the image command?

I am using Matlab for a presentation. I construct an "overhead" by fh=figure; set(fh2,'Position',desiredpositionvecto...

9 years ago | 1 answer | 0

### 1

answerQuestion

Problems using the sound systems in Windows 7

I am moving from an older XP laptop and Matlab R2011a to a brand new Windows 7 laptop again with Matlab R2011a. When I run s...

11 years ago | 2 answers | 0

### 2

answersPause between execution of soundsc

I think something else is going on. I just downloaded R2011a and ran the same program that uses soundsc and there was not latenc...

11 years ago | 0

Question

Integrating old toolboxes into newer versions of Matlab

I have an older version of Matlab (6.1) that has a wavelet toolbox that is quite handy. I recently obtained a license for up to ...

11 years ago | 1 answer | 0

### 1

answerWhat is the best laptop for crunching numbers with Matlab?

Thank you, Jan.

11 years ago | 0

Question

What is the best laptop for crunching numbers with Matlab?

I deal with audio waves sampled at 44.1 KHz and with plotting using mesh. As a result I often cause my 5 year old Toshiba Satell...

11 years ago | 6 answers | 0

### 6

answersQuestion

When am I using too much memory?

Like several posters, I deal with wav files resulting from sampling at 44.1KHz. I notice that Nero Wave Editor can somehow accom...

11 years ago | 0 answers | 0

### 0

answersQuestion

Copying and Pasting 3-D Plots

I am using meshgrid and mesh to generate 3-D plots. The screen versions look fine but when I click on 'edit' and select 'copy fi...

11 years ago | 2 answers | 0

### 2

answersQuestion

Meshgrid for logarithmic scales

I would like to make 3-D plot using mesh in which one axis should be on a logarithmic scale. Is there a way to use meshgrid and ...

11 years ago | 3 answers | 2

### 3

answersQuestion

Mesh Error

I use mesh and meshgrid a fair amount and always get Warning: Unrecognized OpenGL version, defaulting to 1.0. The plot loo...

11 years ago | 1 answer | 0

### 1

answerQuestion

Does Matlab Use All of a PC's Memory?

My laptop (Toshiba Satellite) has 1 GB of memory. I do a lot of work with wav files and I often get "out of memory" errors. If I...

11 years ago | 1 answer | 0

### 1

answerReading mp3 files into Matlab

Sorry. I finally followed the directions of Alfredo F. Franco and extracted to files to an appropriate folder and put the folder...

11 years ago | 0

Question

Reading mp3 files into Matlab

I have used a script/function called "wavread.m" successfully with .wav files. I am trying to use a script/function called "mp3r...

11 years ago | 1 answer | 0

### 1

answerQuestion

How to list property values

I am using plot and other graphics commands that require setting property values. Is there a way I can see all the properties th...

11 years ago | 1 answer | 0

### 1

answerRational Fractions in Symbolic Toolbox

Sorry. I found the answer to my question...vpa (should have known this).

11 years ago | 0

Real function for symbolic variables

Thanks for the responses, the cyclist and Walter Roberson. I think my problem had to do with not declaring the variables properl...

11 years ago | 0