1.   A further problem can be the microphone performance - different microphones can produce different acoustic signals which need to be standardised.

2.   For speech recognition the principal operational difficulty to be faced is the interference to the acoustic signal from background noise.

3.   Would the acoustic signal contain any evidence anyway or does the speaker just talk like that?

4.   The substitution of a phoneme by its mid-class N will therefore increase the probability of a correct correspondence between the phoneme graph and the acoustic signal.

5.   In a follow-up study, the researchers implanted tags in the cod that produced coded acoustic signals.

6.   That information, called nonlinear acoustic signals, is fed to a desktop computer, which produces a color image highlighting the location of the mines.

7.   The tiles reduce sound coming from the vessel and absorb acoustic signals from enemy sonar detectors.