Provides "hints" to the speech recognizer to favor specific words and
phrases in the results.
Hint Boost. Positive value will increase the probability that
a specific phrase will be recognized over other similar
sounding phrases. The higher the boost, the higher the chance
of false positive recognition as well. Negative boost values
would correspond to anti-biasing. Anti-biasing is not enabled,
so negative boost will simply be ignored. Though boost can
accept a wide range of positive values, most use cases are
best served with values between 0 and 20. We recommend using a
binary search approach to finding the optimal value for your
use case.