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Speech Level Measurement: Key Requirements and Relevant Metrics

This document outlines the essential requirements for speech level measurement as presented by Dr. Herman J.M. Steeneken. It emphasizes the need for comparable measurements between male and female voices and across wideband and telephone band contexts. The measurement system should be insensitive to pauses and silent periods, and must maintain a fixed relationship with STI test signal levels. Key metrics discussed include peak levels as overload indicators, RMS levels related to SNR, and guidelines regarding amplitude distribution through direct and envelope sampling.

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Speech Level Measurement: Key Requirements and Relevant Metrics

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  1. Speech Level Measures Dr. Herman J.M. Steeneken

  2. Speech level measurement Requirements: • Male female comparable • Wide band and telephone band comparable • Insensitive for pauses and silent periods • Fixed relation with STI test signal levels

  3. Relevant level measures • Peak levels (overload indicator) • RMS level (root mean square, related to SNR) • Indicator deflections (not reliable)

  4. Mean speech spectra

  5. Level measurement

  6. Amplitude distribution direct sampling

  7. Amplitude distribution envelope sampling

  8. Relation between some speech levels Notice the level differences between speech utterances spoken with and without silent periods in between

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