For each data set, the following table lists the model of sensor, the sensor's location on the specimen, the amplification, the sampling rate, and the names of the data sets in MATLAB and ASCII formats. The name of the data set will serve as a web link to further information, (plots, analyses), if such are available.
If you want to download any or all data sets, see Download Information.
Table of collected data.
Sensor | Location | Ampl (dB) | Fs (MHz) | MATLAB | ASCII |
---|---|---|---|---|---|
A3 | left, forwards | 0 | 20 | lmwr1_1 | lmwr1_1a |
A3 | left, middle | 0 | 20 | lmwr1_2 | lmwr1_2a |
S9220 | blue side down | 0 | 20 | scb | scba |
S9220 | blue side down | 0 | 2 | scr | scra |
S9220 | white side down | 0 | 2 | scg | scga |
Data sets lmwr1_1 and lmwr1_2 were collected simultaneously, on channels 2 & 3, respectively. The transducer for channel 2, (lmwr1_1), was a little further towards the front of the lawnmower than was the transducer for channel3, (lmwr1_2).
Data sets scb, scg, and scr were collected sequentially, (one at a time).
The vertical scale was 0.5 V/div for data sets lmwr1_1 and lmwr1_2. (With 8-bit ADCs, quantization step size is (8 div)*(0.5 V/div)/(2^8)=15.625 mV).
The vertical scale was 0.1 V/div for data sets scb, scr, and scg.
All of the data sets have been compressed using Info-Zip's zip utility. For a description of data formats, including links to free Info-Zip utilities, see Formats.
Experience suggests that Info-Zip compresses our MATLAB files by a factor of about 20:1, and ASCII files about 40:1. Keep this in mind when downloading data.