
63-11Sensor-Based Activity Recognition Techniques
activities as walking, bicycling, brushing teeth, speaking and laughing, and workshop activities such as
sa
wing
an
d
dr
illing
th
at
ha
ve
ch
aracteristic
mo
tions
an
d/or
so
unds
. An ad
vantage
of th
is
ap
proach
is
th
at
it do
es
no
t
re
quire
en
vironment-embedded
se
nsors
. a
t
is
,
th
is
ap
proach
in
curs
no co
st
in te
rms
of mo
ney
or ti
me
fo
r
emb
edding
se
nsors
in in
door
ob
jects
an
d
fu
rniture
. Al
so,
us
ers
ca
n
ea
sily
tu
rn
o th
eir
we
arable
de
vices
wh
en
th
ey
wa
nt
to pr
eserve
th
eir
pr
ivacy
. We
arable
se
nsors
ar
e
ca
pable
of
me
asuring
mo
bility
di
rectly
. e
y
ar
e
we
ll
su
ited
to co
llecting
da
ta
on da
ily
ac
tivity
pa
tterns ...