Audacity

Acoustics

 
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In this eBook (107 pages) the basics of acoustics are presented step by step.

The eBook is designed for beginners!

We start with the sound and in the second chapter we explain everything about level, dB etc. without much mathematical requirements.

With animations and films for the FREE Tool AUDACITY we try to present the basics more clearly. Along the way you will learn to use the AUDACITY tool.



 

In chapter 2 we deal with sound in the time domain and in chapter 3 with sound in the frequency domain.

In chapter 4 we show the human perception, what we actually hear.

And what we really hear shows the last chapter with the psychoacoustics.

 

Inhalt

START
  This eBook
  Software for eBook
  Copyright

----  Sound -------------------------------
What is acoustics?
What is a sound?
How is sound generated?
Periodic and frequency
Amplitude and air pressure
Sound pressure
Damping
Sound intensity and distance
Sound pressure
Wavelength and exciter frequency
Wavelength in water and iron
Speed v
Reflection and diffraction
Two sound waves meet
Sound cancelling
Stationary wave
Diffuse field and near/far field
Reverberation and echo
Reverberation time
Sound absorption
Room acoustics and building acoustics
Moving sound source
Feedback

-----  Time domain ----------------------
AUDACITY Tool
Microphone Function
Microphone Characteristics
Amplifier
Sampling rate
Sampling rate in AUDACITY
Sampling ratein AUDACITY
Sampling points in AUDACITY
Sampling points in AUDACITY
Volume for sine wave
Volume in AUDACITY
Volume in AUDACITY
Volume not sine_signal
Volume Noise
Sound pressure effective value
Linear display
Logarithmic display
Power
Level and decibel
Power
Incoherent sound pressure
Software-Download and Installation
Logarithmic scales
Display large and small amplitudes well
WAV file as voice file
Loudspeaker

---- Frequency range ------------------------
Sine and spectrum
FFT
FFT in AUDACITY
FFT in AUDACITY
Screen resolution
FFT and frequency resolution
FFT and window width
FFT Export to EXCEL
FFT window size
FFT Hanning window
FFT several sine signals
Spectrogram
Spectrogram and events
What is a sound?
What is a tone?
What is a tone?
What is noise?
What is noise?
What is voice and music?
Bang (Transient)
Frequency and pitch
tone colour
Two tones
Binaural
Directional hearing

----- Human hearing ---------------------
Introduction
Hearing threshold and pain threshold
Frequency dependent hearing threshold
Pain threshold on frequency dependent
Voice and music
Sound level L frequency dependent
Curves of equal volume (Phon)
Subjective magnitude
A-weighting
A-weightingin AUDACITY
Noise protection
NVH
The ear

------ Psychoacoustics ------------------------
Introduction
Basilarmembran
Basilarmembran as FFT
Tonality in [Bark]
Masking in the frequency domain
Monitoring threshold frequency dependent
Raise listening threshold
Masking in time domain
Annoyance
Loudness in [Sone]
Loudness calculation according to Zwicker
Loudness calculation according to Zwicker
Sharpness [Acum]
Roughness in [vacil]
Tonality in [tu]
Impulsiveness in [-]
MP3

ENDE





 


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Last Update: 13.04.2020


 

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