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National Institute for Occupational Safety and Health

National Personal Protective Technology Laboratory 

626 Cochrans Mill Road 

Pittsburgh, PA 15236

Procedure No. CVB-APR-STP-0089 Revision: 0.0 Date: 21 March 2020

DETERMINATION OF COMMUNICATION PERFORMANCE TEST FOR SPEECH CONVEYANCE 

AND INTELLIGIBILITY OF POWERED AIR-PURIFYING RESPIRATOR (PAPR) SERIES PAPR100

STANDARD TESTING PROCEDURE

1. PURPOSE

1.1. This test establishes the method for ensuring that the level of speech conveyance and

intelligibility provided by the Communication Performance Test on Powered AirPurifying Respirator (PAPR) Series PAPR100 meet requirements set forth in 42 CFR 

Part 84, Subpart K, Section 84.181. 

1.2. The purpose of this test is to quantify the performance of a respirator in transmitting

intelligible speech of a human test subject. This is accomplished by determining a 

listener’s ability to comprehend single-syllable words spoken by a subject wearing the 

respirator.

2. GENERAL

2.1. This STP describes the Communication Performance Tests for Speech Conveyance and

Intelligibility of a PAPR100 in sufficient detail that a person knowledgeable in the 

appropriate technical field can select equipment with the necessary resolution, conduct 

the test, and determine whether or not the product passes the test.

2.2. The Communication Performance Test shall be performed using the Modified Rhyme 

Test (MRT) to evaluate a listener’s ability to comprehend single-syllable words from a 

speaker. Both listeners and speakers shall be in combinations of masked and unmasked 

postures during the MRT to provide an indication of speech transmission and 

intelligibility. 

2.3. This test is considered a human factors test that requires participation of 8 test subjects to 

quantify the overall performance rating of a PAPR100 system. 

2.4. Two (2) Test Administrators are necessary to properly conduct this test. 

3. EQUIPMENT/MATERIALS

3.1. Laboratory space that permits an unobstructed 10 +1/-0 ft distance between test speaker 

and the listener group when facing one another. Refer to Figure 1. for the subject and 

equipment positioning for the Modified Rhyme Test setup. 

3.2. Noise Plug, Precision Pink Noise Test Generator (GTC Industries) or equivalent for 

producing pink noise in the frequency range of 20.0 Hz to 50.0 kHz. Accuracy: 3dB per 

octave rolloff from 20 Hz to 20 KHz. Pink noise is defined as an audio test signal that 
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contains all the frequencies in the audio spectrum with equal energy at each octave. Pink 

noise contains less energy at the higher audio frequencies than at the lower ones - See 

Figure 1. 

3.3. A stereo amplifier used to transmit and amplify the signal for the pink noise background. 

3.4. The two loudspeakers positioned midway between the test speaker and listeners. Details 

of the exact positioning of the speaker equipment are further defined in Section 5.3.2. 

3.5. Two Type 2 digital sound level meters (Sper Scientific, LTD, Model 840029 – See 

Figure 3.) with an “A” weighting decibel scale of 30 to 130 dB or equivalent. One sound 

level meter will be positioned in front of the Test Speaker and the second sound level 

meter will be positioned at head level beside listener L2- see Figure 1. 

3.6. Sper Scientific, LTD Acoustical calibrator (model 840031) or equivalent is used to 

calibrate the sound level meters – See Figure 4. 

3.7. Twelve word lists from the Modified Rhyme Test (MRT). These twelve word lists are 

separated onto individual sheets to be used by the test speakers during the test – See 

Appendix A. 

3.8. Test listeners’ multiple-choice answer pages on laptops or equivalent. Modified Rhyme 

Test listener responses are recorded and scored using laptops that have been programmed 

for this application; otherwise, the manual method using multiple-choice answer sheets 

can be used – See Example Data Sheet 8.1. 

3.9. Sound and/or audiovisual recording device for recording speech.

3.10. Human Test Subjects

3.10.1. Test Administrators shall have successfully completed the CDC/ATSDR 

Scientific Ethics Training, the DHHS/NIH Human Participant Protections 

Education for Research Teams, or equivalent course.

3.10.2. At least eight (8) volunteer test subjects are required for this test. 

4. TESTING REQUIREMENTS AND CONDITIONS

4.1. Prior to beginning any testing, confirm that all measuring equipment being used has been 

calibrated in accordance with the testing laboratory’s calibration procedure and schedule. 

All measuring equipment utilized for this testing must have been calibrated using a 

method traceable to recognized international standards when available.

4.2. Administrator 1 will monitor the test speakers’ speech and the actions of the listener 

group to make sure they are responding to the test speaker. 
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4.3. Administrator 2 will monitor the dBA level of the test speaker and give verbal or 

nonverbal feedback as to loudness of his/her speech and record the dBA level on the data

sheet – see Example Data Sheet 8.2.

4.4. The eight test subjects will be divided into two groups, a listener group comprised of 

three subjects (at least one female and one male) and a speaker group comprised of five 

subjects (at least one female and one male). 

4.5. All subjects shall be fluent in English. In addition, these subjects shall have no obvious 

or strong regional or foreign accents. 

4.6. The eight test subjects shall be trained in the donning and use of the respirator per 

manufacturer’s instructions by the test administrator.

4.7. Each subject shall be sized and fitted for the respirator per manufacturer’s instructions. 

Where an individual is qualified to wear multiple sizes of the respirator, the subject shall 

select the respirator size that provides the most comfortable fit.

4.8. The subjects shall have normal hearing. 

4.9. The test subjects shall not have any facial hair or conditions that may cause interference 

with the seal of the respirator facepiece.

4.10. Test Equipment Set-Up.

4.10.1. Room selected to perform the MRT shall be of ample size to comfortably house 

all the test equipment indicated and the personnel associated with the test. It 

shall be free of external noise interference.

4.10.2. The loudspeakers shall be positioned opposite each other at a height of 

approximately 29.5 inches from the floor and 9 +0.5/-0 ft from the center of the 

sound field between the test speaker and listeners. The laptops will be placed 

directly in front of the listeners at a convenient distance away – See Figure 1. 

5. PROCEDURE

 

5.1. Fill in the Pretest data on the data sheet – See Example Data Sheet 8.1. 

5.2. Record the background noise of the room, assuring no external noise, at the center 

listener’s head position. 

5.3. Training of the Test Speakers.

5.3.1. Without the listeners in the room, one subject at a time will be seated in the test

speaker’s position and given an MRT word list – See Appendix A. A sound level 

meter will be positioned in front of the test speaker to assess the volume of their

voice as the word list is read. The sound level meter shall be set to display “A”-

weighted sound levels.
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5.3.2. Test administrator 1 shall be seated beside the test speaker to monitor the reading 

of the word list. The administrator shall instruct the test speaker to read, without 

placing any unusual emphasis on any stimulus word, at a rate of approximately 

one phrase every 6 seconds, using the introductory phrase “The word is (list 

word)”. In addition, the test speaker shall be directed to communicate each word 

without using any visual gestures, such as hand signals, and without repeating 

any of the list words. 

5.3.3. Test administrator 2 shall be seated in the center test listener’s position and will 

instruct the test speaker to begin reading the word list at a voice level of 75 to 85 

dBA. 

5.3.4. During the reading of the word list, test administrator 2 will monitor the “A”-

weighted output volume of the speaker and provide feedback as to the loudness 

of the speaker’s performance throughout the reading of the word list. Test 

administrator 1 will provide feedback to the test speaker regarding the 

pronunciation of the list words and the rate of performance. Additional training 

will be done if warranted per the judgment of the test administrators. These 

procedures will be completed without the use of a respirator and without any 

background noise above ambient conditions. 

5.3.5. Additionally, training with background noise of 60 ± 2 dBA (consisting of pink

noise), will also be completed according to the above procedures. 

5.3.6. This will be repeated for all subjects in the speaker group. 

5.4. Training of the Test Listeners.

5.4.1. The three test listeners are seated facing a single test speaker at a distance of 10 

ft. The listeners are seated next to one another with approximately one foot 

between them. Each listener will be given a laptop with a list of multiple-choice

words for recording his or her responses. 

5.4.2. An MRT word list will be provided to a trained test speaker. The test speaker 

will be instructed to communicate the word list to the test listeners as was done 

during speaker training. 

5.4.3. As a group, listeners will be instructed to listen attentively as the test speaker 

reads 50 words to them each with the introductory phrase “The word is (list 

word).” The test listeners shall be directed to select, or make a best guess of the 

word, that was perceived to be spoken from the six possible response words 

provided to them on the laptops. Test listeners are instructed to provide a 

“thumbs-up” hand signal to the speaker as a cue to say the next phrase. 

5.4.4. During the reading of the word list, administrator 2 will monitor the A-weighted 

output volume of the speaker at the listening position and provide feedback as to 

the loudness throughout the reading of the word list. In addition, test 
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administrator 1 will provide the test speaker feedback regarding the rate of 

performance. Administrator 1 will also monitor the actions of the listener group 

and provide additional instructions as needed. Test administrators will determine 

if additional training is required. These procedures will be completed without the 

use of a respirator and without any added background noise (pink noise) above 

ambient conditions.

5.4.5. Additionally, training with added background noise of 60 ± 2 dBA (consisting of 

pink noise), will also be conducted according to the procedures above. 

5.5. Conducting the Test.

5.5.1. The noise generator shall be turned on and set to produce 60 ±2 dBA of pink 

noise, as measured by the sound level meter at the center test listener’s head 

position without listeners present. This value shall be recorded on the Respirator 

Communication Performance Test Data Collection Sheet. 

5.5.2. The three test listeners shall be seated in the listening position with a laptop

located conveniently in front of them. 

5.5.3. A test speaker will then be positioned in the speaking position and present one 

complete MRT word list to the listening panel. A different test speaker shall then 

be used to present the next MRT trial. Test speakers will continue to rotate 

among the speaker test panel until all trials have been completed. 

5.5.4. Data will be obtained without the respirator (unmasked) and with the respirator

(masked) worn and operated per the manufacturer’s instructions by both speakers 

and listeners. All conditions shall be randomly assigned, and a different word list 

shall be used for each test. A test matrix of the MRT conditions is provided in 

Table 2 to assist the test administrator in establishing the sequence of testing.

5.5.5. Background noise levels shall be monitored at the center test listener’s head 

position and recorded, on the Respirator Communication Performance Test Data 

Collection Sheet, at the beginning, middle, and end of each MRT session by 

administrator 2.

5.5.6. The test speakers shall be monitored and recorded during the test to determine if 

the test speakers conform to the word list specified for each trial by test 

administrator 1. Test administrator 1 shall also make note of any improperly 

pronounced or misspoken words by the test speakers. 

5.5.7. A total of 10 MRT trials shall be performed; 5 unmasked and 5 masked. This

will result in a total of 15 MRT scores (five per listener) for the unmasked

condition and 15 scores for the masked condition. 

5.6. Data Analysis.
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5.6.1. Use the Respirator Communication Performance Test Data Collection Sheets to 

assist with the analysis of the 10 MRT scores for each listener.

5.6.2. The number of correct responses shall be adjusted for chance or guessing made 

possible by the multiple-choice answers using the equation:

5.6.3. Determine the Number of Words Spoken Correctly by the speakers from either 

the Test Administrators notes or if necessary, by listening to the Audio recorder 

tapes.

5.6.4. Listener performance on the MRT shall be scored in terms of the percentage of 

words correctly identified using the equation for both the masked and unmasked 

posture: 

% Correct = (Adjusted Score/Number of Words Spoken Correctly) * 100 

5.6.5. Average Unmasked and Average Masked % Correct Scores shall be calculated 

for each individual listener. 

5.6.6. Each individual listener’s Average Masked % Correct Score shall be divided by 

their Average Unmasked % Correct Score to calculate a Performance Rating

using the equation:

5.6.7. Performance Rating (%) = 

5.6.8. The performance rating of all listeners shall then be averaged to determine the 

Overall Performance Rating of the PAPR100 using the following Equation:

Overall Performance Rating (%) =

6. PASS/FAIL CRITERIA

6.1. The requirement for passing this test is set forth in 42 CFR, Part 84, Subpart K, Section 

84.181. 

6.2. A candidate PAPR100 must obtain an Overall Performance Rating greater than or equal 

to 70% to meet the Communication requirement. 

7. RECORDS/TEST SHEETS

Performance Rating (%) L1 + Performance Rating (%) L2 + Performance Rating (%) L3 

3 

Adjusted Score = Number of Correct _ Number of Wrong 

 Listener Responses Listener Responses 

 5 
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7.1. All test data shall be recorded on the Respirator Communication Performance Test Data 

Collection Sheets. 

8. ATTACHMENTS

8.1. Example Data Sheet - Communication Performance Test Listener Data Sheet

8.2. Example Data Sheet - Communication Performance Test Data Collection Sheet

8.3. Table 1. MTR Trial Matrix

8.4. Figures 

8.4.1. Figure 1. Modified Rhyme Test Setup 

8.4.2. Figure 2. Photograph of Noise Plug, Precision Pink Noise Generator (GTC 

Industries) 

8.4.3. Figure 3. Photograph of Sper Scientific LTD digital sound level meter, Model 

840029 

8.4.4. Figure 4. Photograph of Acoustical calibrator (Sper Scientific model 840031) 

8.5. Appendix A. Communication Performance Word List Test Sheets
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8.1. Example Data Sheet – Communication Performance Test Listener Data Sheet
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8.2. Example Data Sheet – Communication Performance Test Data Collection Sheet
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8.3. Table 2. MRT Trial Matrix

Trial # Speaker With or Without Mask Word list

1 1 No mask 11A

2 2 No mask 3A

3 3 Masked 5A

4 4 Masked 7A

5 5 No mask 4A

6 2 Masked 12A

7 4 No mask 5A

8 1 Masked 1A

9 5 Masked 8A

10 3 No mask 6A

8.4. Diagram 1. Modified Rhyme Test Setup
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8.5. Figure 1. Noise Plug, Precision Pink Noise Generator (GTC Industries) 

8.6. Figure 2. Sper Scientific LTD digital sound level meter, Model 840029 
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8.7. Figure 3. Acoustical calibrator (Sper Scientific model 840031)
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8.8. Appendix A. Communication Performance Word List Test Sheets

Appendix A 

Modified Rhyme Test Word Lists 
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List 1A

1. The word is but 

2. The word is kit 

3. The word is peak 

4. The word is pig 

5. The word is cold 

6. The word is sick 

7. The word is pat 

8. The word is beat 

9. The word is hot 

10. The word is fit 

11. The word is sung 

12. The word is sent 

13. The word is rest 

14. The word is mat 

15. The word is top 

16. The word is sack 

17. The word is day 

18. The word is heal 

19. The word is name 

20. The word is pay 

21. The word is must 

22. The word is pun 

23. The word is hen 

24. The word is cud 

25. The word is book 

26. The word is late 

27. The word is led 

28. The word is same 

29. The word is pin 

30. The word is feel 

31. The word is soil 

32. The word is fizz

33. The word is park 

34. The word is bash 

35. The word is till 

36. The word is male 

37. The word is dud 

38. The word is sin 

39. The word is tack 

40. The word is case 

41. The word is bang 

42. The word is thaw 

43. The word is ray 

44. The word is dig 

45. The word is team 

46. The word is win 

47. The word is seek 

48. The word is bun 

49. The word is feat 

50. The word is sip
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List 2A 

1. The word is bus 

2. The word is kick 

3. The word is peas 

4. The word is fig 

5. The word is hold 

6. The word is lick 

7. The word is pass

8. The word is beach 

9. The word is pot 

10. The word is bit 

11. The word is sub 

12. The word is went 

13. The word is west 

14. The word is map 

15. The word is cop 

16. The word is sap 

17. The word is pay 

18. The word is heath 

19. The word is tame 

20. The word is pale 

21. The word is gust 

22. The word is pus 

23. The word is then 

24. The word is cuss 

25. The word is cook 

26. The word is lace 

27. The word is bed 

28. The word is save 

29. The word is pit 

30. The word is reel 

31. The word is boil 

32. The word is fib 

33. The word is bark 

34. The word is bad 

35. The word is fill 

36. The word is gale 

37. The word is duck 

38. The word is sit 

39. The word is tap 

40. The word is cane 

41. The word is sang 

42. The word is saw 

43. The word is race 

44. The word is dim 

45. The word is teak 

46. The word is din 

47. The word is seethe 

48. The word is run 

49. The word is meat 

50. The word is dip
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List 3A 

1. The word is bug 

2. The word is kin 

3. The word is peach 

4. The word is rig 

5. The word is gold 

6. The word is tick 

7. The word is pan 

8. The word is beak 

9. The word is got 

10. The word is hit 

11. The word is sup 

12. The word is rent 

13. The word is best 

14. The word is math 

15. The word is hop 

16. The word is sad 

17. The word is gay 

18. The word is heap 

19. The word is fame 

20. The word is page 

21. The word is bust 

22. The word is puff 

23. The word is ten 

24. The word is cup 

25. The word is took 

26. The word is lake 

27. The word is shed 

28. The word is safe 

29. The word is pig 

30. The word is eel 

31. The word is toil 

32. The word is fill

33. The word is lark 

34. The word is bath 

35. The word is will 

36. The word is tale 

37. The word is dung 

38. The word is sill 

39. The word is tang 

40. The word is cave 

41. The word is rang 

42. The word is jaw 

43. The word is raze 

44. The word is dip 

45. The word is teal 

46. The word is pin 

47. The word is seem 

48. The word is fun 

49. The word is heat 

50. The word is rip
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List 4A

1. The word is bun 

2. The word is kill 

3. The word is peace 

4. The word is big 

5. The word is told 

6. The word is kick 

7. The word is pad 

8. The word is bean 

9. The word is lot 

10. The word is kit 

11. The word is sum 

12. The word is bent 

13. The word is vest 

14. The word is man 

15. The word is mop 

16. The word is sat 

17. The word is say 

18. The word is hear 

19. The word is game 

20. The word is pave 

21. The word is dust 

22. The word is puck 

23. The word is men 

24. The word is cuff 

25. The word is hook 

26. The word is lane 

27. The word is fed 

28. The word is sale 

29. The word is pip 

30. The word is peel 

31. The word is coil 

32. The word is fit 

33. The word is mark 

34. The word is bat 

35. The word is bill 

36. The word is bale 

37. The word is dub 

38. The word is sing 

39. The word is tam 

40. The word is cape 

41. The word is hang 

42. The word is law 

43. The word is rake 

44. The word is dill 

45. The word is tease 

46. The word is fin 

47. The word is seen

48. The word is gun 

49. The word is seat 

50. The word is hip
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List 5A

1. The word is buck 

2. The word is king 

3. The word is peat 

4. The word is dig 

5. The word is fold 

6. The word is wick 

7. The word is pack 

8. The word is bead 

9. The word is not 

10. The word is wit 

11. The word is sun 

12. The word is tent 

13. The word is test 

14. The word is mad 

15. The word is pop 

16. The word is sass 

17. The word is way 

18. The word is heat 

19. The word is same 

20. The word is pane 

21. The word is just 

22. The word is pup 

23. The word is pen 

24. The word is cut 

25. The word is shook 

26. The word is lay 

27. The word is red 

28. The word is sane 

29. The word is pill 

30. The word is keel 

31. The word is oil 

32. The word is fig 

33. The word is hark 

34. The word is ban 

35. The word is hill 

36. The word is pale 

37. The word is dun 

38. The word is sick 

39. The word is tab 

40. The word is cake 

41. The word is fang 

42. The word is raw 

43. The word is rate 

44. The word is did 

45. The word is teach 

46. The word is sin 

47. The word is seed 

48. The word is sun 

49. The word is neat 

50. The word is tip
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List 6A

1. The word is buff 

2. The word is kid 

3. The word is peal 

4. The word is wig 

5. The word is sold 

6. The word is pick 

7. The word is path 

8. The word is beam 

9. The word is tot 

10. The word is sit 

11. The word is sud 

12. The word is dent 

13. The word is nest 

14. The word is mass 

15. The word is shop 

16. The word is sag 

17. The word is may 

18. The word is heave 

19. The word is came 

20. The word is pace 

21. The word is rust 

22. The word is pub 

23. The word is den 

24. The word is cub 

25. The word is look 

26. The word is lame 

27. The word is wed 

28. The word is sake 

29. The word is pick 

30. The word is heel 

31. The word is foil 

32. The word is fin 

33. The word is dark 

34. The word is back 

35. The word is kill 

36. The word is sale 

37. The word is dug 

38. The word is sip 

39. The word is tan 

40. The word is came 

41. The word is gang 

42. The word is paw 

43. The word is rave 

44. The word is din 

45. The word is tear 

46. The word is tin 

47. The word is seep

48. The word is nun 

49. The word is beat

50. The word is lip
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List 7A

1. The word is lick 

2. The word is beat 

3. The word is puff

4. The word is cook 

5. The word is tip 

6. The word is rave 

7. The word is hang 

8. The word is till 

9. The word is math 

10. The word is sale 

11. The word is same 

12. The word is peal 

13. The word is kit 

14. The word is sat 

15. The word is sin 

16. The word is gold 

17. The word is buff 

18. The word is lay 

19. The word is nun 

20. The word is must 

21. The word is pad 

22. The word is din 

23. The word is sit 

24. The word is win 

25. The word is teak

26. The word is dent 

27. The word is sub 

28. The word is led 

29. The word is tot 

30. The word is dub 

31. The word is pip 

32. The word is seen 

33. The word is way 

34. The word is west 

35. The word is pace 

36. The word is bat 

37. The word is mop 

38. The word is big 

39. The word is tab 

40. The word is case 

41. The word is name 

42. The word is soil 

43. The word is fin

44. The word is cuff 

45. The word is heal 

46. The word is hark 

47. The word is heat

48. The word is then 

49. The word is law 

50. The word is bean
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Procedure No. CVB-APR-STP-0089 Revision: 0.0 Date: 21 March 2020 Page 21 of 26

List 8A

1. The word is wick 

2. The word is neat 

3. The word is puck 

4. The word is took 

5. The word is rip 

6. The word is ray 

7. The word is sang 

8. The word is will 

9. The word is man 

10. The word is gale 

11. The word is safe 

12. The word is peas 

13. The word is kid 

14. The word is sass 

15. The word is sick 

16. The word is hold 

17. The word is but 

18. The word is lane 

19. The word is bun 

20. The word is just 

21. The word is pan 

22. The word is dig 

23. The word is bit 

24. The word is pin 

25. The word is tease

26. The word is sent 

27. The word is sup 

28. The word is red 

29. The word is not 

30. The word is dung 

31. The word is pig 

32. The word is seem 

33. The word is day 

34. The word is rest 

35. The word is page 

36. The word is bash 

37. The word is shop 

38. The word is fig 

39. The word is tam 

40. The word is cane 

41. The word is same 

42. The word is toil 

43. The word is fill

44. The word is cuss 

45. The word is feel 

46. The word is bark 

47. The word is heath

48. The word is ten 

49. The word is thaw 

50. The word is bead
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Procedure No. CVB-APR-STP-0089 Revision: 0.0 Date: 21 March 2020 Page 22 of 26

List 9A

1. The word is pick 

2. The word is meat 

3. The word is pub 

4. The word is look 

5. The word is sip 

6. The word is rake 

7. The word is fang 

8. The word is bill 

9. The word is mat 

10. The word is male 

11. The word is sane 

12. The word is peach 

13. The word is kill 

14. The word is sack 

15. The word is sill 

16. The word is cold 

17. The word is bug 

18. The word is lace 

19. The word is sun 

20. The word is gust 

21. The word is pass 

22. The word is dim 

23. The word is fit 

24. The word is fin 

25. The word is teach

26. The word is went 

27. The word is sum 

28. The word is wed 

29. The word is hot 

30. The word is dud 

31. The word is pill 

32. The word is seethe 

33. The word is pay 

34. The word is vest 

35. The word is pace 

36. The word is back 

37. The word is top 

38. The word is rig 

39. The word is tap 

40. The word is cave 

41. The word is game 

42. The word is foil 

43. The word is fit

44. The word is cup 

45. The word is eel 

46. The word is park 

47. The word is heap

48. The word is pen 

49. The word is paw 

50. The word is beam
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Procedure No. CVB-APR-STP-0089 Revision: 0.0 Date: 21 March 2020 Page 23 of 26

List 10A 

1. The word is kick 

2. The word is feat 

3. The word is pup 

4. The word is book 

5. The word is lip 

6. The word is rate 

7. The word is bang 

8. The word is fill 

9. The word is mass 

10. The word is tale 

11. The word is sale 

12. The word is peak 

13. The word is king 

14. The word is sag 

15. The word is sip 

16. The word is told 

17. The word is bun 

18. The word is lake 

19. The word is gun 

20. The word is bust 

21. The word is pat 

22. The word is did 

23. The word is kit 

24. The word is tin 

25. The word is tear

26. The word is bent 

27. The word is sun 

28. The word is shed 

29. The word is pot 

30. The word is duck 

31. The word is pin 

32. The word is seed

33. The word is gay 

34. The word is test 

35. The word is pave 

36. The word is bath 

37. The word is pop 

38. The word is pig 

39. The word is tan 

40. The word is cape 

41. The word is came 

42. The word is boil 

43. The word is fib

44. The word is cud 

45. The word is keel 

46. The word is lark 

47. The word is heave

48. The word is den 

49. The word is saw 

50. The word is beat
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Procedure No. CVB-APR-STP-0089 Revision: 0.0 Date: 21 March 2020 Page 24 of 26

List 11A 

1. The word is tick 

2. The word is heat 

3. The word is pus 

4. The word is hook 

5. The word is dip 

6. The word is raze 

7. The word is gang 

8. The word is hill 

9. The word is mad 

10. The word is bale 

11. The word is save 

12. The word is peace 

13. The word is kin 

14. The word is sad 

15. The word is sit 

16. The word is fold 

17. The word is bus 

18. The word is late 

19. The word is run 

20. The word is rust 

21. The word is pack 

22. The word is dill 

23. The word is wit 

24. The word is din 

25. The word is teal

26. The word is rent 

27. The word is sung 

28. The word is bed 

29. The word is lot 

30. The word is dug 

31. The word is pick

32. The word is seek

33. The word is say 

34. The word is best 

35. The word is pay 

36. The word is ban 

37. The word is hop 

38. The word is dig 

39. The word is tang 

40. The word is cake 

41. The word is fame 

42. The word is coil 

43. The word is fig

44. The word is cut 

45. The word is peel 

46. The word is mark 

47. The word is heal

48. The word is men 

49. The word is jaw 

50. The word is beach
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Procedure No. CVB-APR-STP-0089 Revision: 0.0 Date: 21 March 2020 Page 25 of 26

List 12A 

1. The word is sick 

2. The word is seat 

3. The word is pun 

4. The word is shook 

5. The word is hip 

6. The word is race 

7. The word is rang 

8. The word is kill 

9. The word is map 

10. The word is pale 

11. The word is sake 

12. The word is peat 

13. The word is kick 

14. The word is sap 

15. The word is sing 

16. The word is sold 

17. The word is buck 

18. The word is lame 

19. The word is fun 

20. The word is dust 

21. The word is path 

22. The word is dip 

23. The word is hit 

24. The word is sin 

25. The word is team

26. The word is tent 

27. The word is sud 

28. The word is fed 

29. The word is got 

30. The word is dun 

31. The word is pit 

32. The word is seep

33. The word is may 

34. The word is nest 

35. The word is pane 

36. The word is bad 

37. The word is cop 

38. The word is wig 

39. The word is tack 

40. The word is came 

41. The word is tame 

42. The word is oil 

43. The word is fizz

44. The word is cub 

45. The word is reel 

46. The word is dark 

47. The word is hear

48. The word is hen 

49. The word is raw 

50. The word is beak
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Procedure No. CVB-APR-STP-0089 Revision: 0.0 Date: 21 March 2020 Page 26 of 26

Revision History

Revision Date Reason for Revision

0.0 21 March 2020 Original release