- There must be an Unknown directory:
- Holds samples that sound similar to the keywords
- Directory needs to be labeled as “Unknown”
- Recommendation is to keep “Unknown” empty
- This directory can have samples that sound similar to the keywords:
- Unknown Directory can have up to 500 samples/keyword
- Ex: For 3 Keywords, Unknown directory can have at most 500*3 = 1500 samples
- These samples must follow the same specifications as the keywords
- ***Practice caution when exercising the Unknown directory
- Directory should be populated if you would like to have low FAR
- Using words too similar to the keyword will have an adverse impact to FRR
- Directory can be kept empty if desired, but the directory must exist