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The Behavior of OpenSound Navigator in Complex Environments

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1.  The Analysis step in OpenSound Navigator tracks the following dimension:
  1. Level
  2. Location
  3. Frequency
  4. Speech versus Nonspeech
  5. All of the above
2.  A distinguishing feature of OpenSound Navigator is:
  1. the elimination of occlusion
  2. using both a omni directional and a backwards facing monitoring of the sound environment
  3. its approach to own voice processing
  4. bandwidth
3.  Complex environments can include:
  1. Stationary, non-speech noise
  2. Non-stationary, non-speech noise
  3. Competing talkers
  4. Noises that change in level over time
  5. All of the above
4.  If speech is coming from in front and noise is coming from behind:
  1. No high-end devices can increase the S/N
  2. Beam forming systems tend to shut down
  3. OpenSound navigator reacts rapidly and provides a stable control of the noise
  4. Beam forming systems are the only systems that can improve the S/N
5.  If speech is coming from both the front and side with noise coming from around the listener:
  1. Beam forming best preserves the speaker from the side
  2. OpenSound Navigator better protects the speech coming from the side
  3. Only an omni-directional setting can preserve the talker from the side
  4. OpenSound navigator will only preserves the talker from the front
6.  If the noise signal starts, stops and then resumes:
  1. All systems will cut gain
  2. Traditional noise reduction and directionality will respond the fastest
  3. OpenSound Navigator will track these changes and respond rapidly and accurately
  4. OpenSound Navigator will pause to see if the fluctuations will happen again
7.  The recordings used in this seminar:
  1. Were made in KEMAR™'s ear canal
  2. Included high-end devices with different approaches to processing
  3. Allowed for the examination of the effect of processing on the S/N
  4. Were made with speakers in multiple locations
  5. All of the above
8.  When testing devices that are forced into feedback:
  1. All devices respond in a similar manner
  2. OpenSound Optimize allows for a more stable response when feedback is a challenge compared to traditional approaches
  3. All high-end devices prioritize preserving full gain
  4. All high-end devices respond to feedback in a similar time frame
9.  When noise comes both behind and in front of the listener:
  1. All systems will be more challenged to improve the S/N
  2. Beam forming will orient the response towards the side
  3. OpenSound Navigator will shift into a comfort mode
  4. Traditional noise reduction and directionality will shut down
10.  Based on the recordings presented, different high-end devices vary significantly:
  1. On high-frequency bandwidth
  2. Ease of making live recordings
  3. Start-up time
  4. On speed and effectiveness in response to noise in complex environments