77
load (the wear and tear on the body), concentration difficulties, and cardiovascular
disease (Basner et al. 2014; Münzel et al. 2020; Eriksson et al. 2018; Basner et al.
2014; WHO 2018; Brown and Van 2017; Guski et al. 2017).
2.6.1 Wave Terminology
There are a number of terms in common, of which the more important terms are
defined in Table 2.10.
2.6.2 Sound Energy Density
The quantity of sound energy per unit volume of a sound wave is called the
sound energy density.
Sound energy affects a receiver depending on the distance of the receiver from
the source of sound.
Acoustics near field is a distance up to two wavelengths from sound source
(Fig. 2.27). Distance beyond two wavelengths is considered as far field. A diffusive
Image
f
f
f
f
Fig. 2.23 Line diagram showing the object at infinity
Fig. 2.24 Chromatic
dispersion in a prism
2.6 Acoustics
load (the wear and tear on the body), concentration difficulties, and cardiovascular
disease (Basner et al. 2014; Münzel et al. 2020; Eriksson et al. 2018; Basner et al.
2014; WHO 2018; Brown and Van 2017; Guski et al. 2017).
2.6.1 Wave Terminology
There are a number of terms in common, of which the more important terms are
defined in Table 2.10.
2.6.2 Sound Energy Density
The quantity of sound energy per unit volume of a sound wave is called the
sound energy density.
Sound energy affects a receiver depending on the distance of the receiver from
the source of sound.
Acoustics near field is a distance up to two wavelengths from sound source
(Fig. 2.27). Distance beyond two wavelengths is considered as far field. A diffusive
Image
f
f
f
f
Fig. 2.23 Line diagram showing the object at infinity
Fig. 2.24 Chromatic
dispersion in a prism
2.6 Acoustics