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puretones.Rmd
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puretones.Rmd
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---
title: "puretones"
author: "Brian C Leavell"
date: "`r Sys.Date()`"
output: html_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
## Generating series of pure sine tones for use in ultrasonic propagation study
Goal: Generate 5 pure tones as single .wav file.
Details: This creates a series of pure (i.e. no frequency or amplitude modulation) sinusoidal tones that are based off the range of echolocation frequencies of species listed in the pdf "WesternUS_Acoustic_Table_Mar2011" by Joe Szewczak, Humboldt State University Bat Lab, June 2018. The series begins at 10 kHz, which is near the lower end of *Euderma maculatum*'s call. It continues in increments of 10 kHz (i.e. 10 kHz, 20 kHz, 30 khz, ...) and ends at 100 kHz, which is near the upper end of *Myotis californicus*'s call. Each tone is 10 ms in duration, which is within the range of call durations from the aforementioned pdf.
```{r packages}
library(seewave)
```
Create files
* Settings:
* Pure tones in sequence (in Khz): 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
* Sine waves
* Fade-in & Fade-out = None
* Sample rate = 250 kHz
* Bit depth = 16 (PCM)
* Duration = 0.19 sec (10 msec per tone, 10 msec silent interval between signals)
```{r tone}
kHz_10 <- synth(f = 250000,
cf = 10000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_20 <- synth(f = 250000,
cf = 20000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_30 <- synth(f = 250000,
cf = 30000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_40 <- synth(f = 250000,
cf = 40000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_50 <- synth(f = 250000,
cf = 50000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_60 <- synth(f = 250000,
cf = 60000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_70 <- synth(f = 250000,
cf = 70000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_80 <- synth(f = 250000,
cf = 80000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_90 <- synth(f = 250000,
cf = 90000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
kHz_100 <- synth(f = 250000,
cf = 100000,
d = 0.01,
a = 1,
signal = "sine",
output = "Wave"
)
#Add silence to each file (except kHz_100 since it is last)
kHz_10 <- addsilw(kHz_10, at = "end", d = 0.01, output = "Wave")
kHz_20 <- addsilw(kHz_20, at = "end", d = 0.01, output = "Wave")
kHz_30 <- addsilw(kHz_30, at = "end", d = 0.01, output = "Wave")
kHz_40 <- addsilw(kHz_40, at = "end", d = 0.01, output = "Wave")
kHz_50 <- addsilw(kHz_50, at = "end", d = 0.01, output = "Wave")
kHz_60 <- addsilw(kHz_60, at = "end", d = 0.01, output = "Wave")
kHz_70 <- addsilw(kHz_70, at = "end", d = 0.01, output = "Wave")
kHz_80 <- addsilw(kHz_80, at = "end", d = 0.01, output = "Wave")
kHz_90 <- addsilw(kHz_90, at = "end", d = 0.01, output = "Wave")
#Join audio files
a <- pastew(kHz_20, kHz_10, output = "Wave")
b <- pastew(kHz_30, a, output = "Wave")
c <- pastew(kHz_40, b, output = "Wave")
d <- pastew(kHz_50, c, output = "Wave")
e <- pastew(kHz_60, d, output = "Wave")
f <- pastew(kHz_70, e, output = "Wave")
g <- pastew(kHz_80, f, output = "Wave")
h <- pastew(kHz_90, g, output = "Wave")
puretones <- pastew(kHz_100, h, output = "Wave")
savewav(puretones, filename = "puretones.wav") #final file save as .wav
```
## Oscillogram
``` {r oscillo}
oscillo(puretones)
```
## Power spectrum
``` {r powerspec}
meanspec(puretones, wl = 1024)
```
## Spectrogram
``` {r spectrogram}
spectro(puretones, wl = 1024)
```
##References
"WesternUS_Acoustic_Table_Mar2011" by Joe Szewczak, Humboldt State University Bat Lab, June 2018