Transcript

Making Sense of SmellsA Guide for Understanding Farmstead Odors

Part 6: Simulated Olfactometry Exercise

Douglas W. HamiltonWaste Management SpecialistBiosystems and Agricultural Engineering

Odor Measurement

How Strong?

How Bad?

Intensity

Offensiveness

Sniff Test

#1 #2 #3 #4

How Strong?

How Bad?

Sniff Test

#1 #2 #3 #4

How Strong?

How Bad?

IntensityScale = 0 to 6

Sniff Test

#1 #2 #3 #4

How Strong?

How Bad?

IntensityScale = 0 to 6

OffensivenessScale = 0 to 6

Sample 1

How Strong? _____

How Bad? ______

Intensity Scale

0 = no odor

1 = very faint

2 = faint

3 = distinct

4 = strong

5 = very strong

6 = extremely strong

Offensiveness Scale

0 = Inoffensive

1 = Very faintly Offensive

2 = Faintly Offensive

3 = Definitely Offensive

4 = Strongly Offensive

5 = Very Strongly Offensive

6 = Extremely Offensive

Two Assumptions

1. Responses are predictable, but show variability within a population

0

5

10

15

20

25

30

0 1 2 3 4 5 6

Offensiveness

Nu

mb

er o

f R

esp

on

ses

0

5

10

15

20

25

30

0 1 2 3 4 5 6

Offensiveness

Nu

mb

er o

f R

esp

on

ses

0

5

10

15

20

25

30

0 1 2 3 4 5 6

Offensiveness

Nu

mb

er o

f R

esp

on

ses

0

1

2

3

4

5

6

0 1 2 3 4 5 6

Intensity

Off

ensi

ven

ess

0

1

2

3

4

5

6

0 1 2 3 4 5 6

Intensity

Off

ensi

ven

ess

0

1

2

3

4

5

6

0 1 2 3 4 5 6

Intensity

Off

ensi

ven

ess

Two Assumptions

1. Responses are predictable, but show variability within a population

2. Intensity and Offensiveness are independent measurements


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