If the respiratory airflow sampling rate is reduced from 100 Hz to 25 Hz, which consequence is most likely?

If the respiratory airflow sampling rate is reduced from 100 Hz to 25 Hz, which consequence is most likely?

• A. Higher noise
• B. Less detail in waveform
• C. Faster data transfer
• D. Higher battery consumption

Answer: (B)

Lowering the sampling rate reduces temporal resolution, so the airflow waveform has fewer data points per second to define its shape. With 25 samples per second instead of 100, rapid changes and the precise timing of peaks become harder to resolve, making the waveform appear smoother and less detailed. This happens because the signal is reconstructed from fewer samples, so fine features are lost. While respiration is mainly low-frequency, the lower rate still diminishes detail because there are simply fewer points to capture the waveform's nuances. The other effects listed don’t reflect the primary impact of reducing how often you sample the signal; lower sampling generally reduces data volume and can lower power use, rather than increasing noise or making transmission harder.

Lowering the sampling rate reduces temporal resolution, so the airflow waveform has fewer data points per second to define its shape. With 25 samples per second instead of 100, rapid changes and the precise timing of peaks become harder to resolve, making the waveform appear smoother and less detailed. This happens because the signal is reconstructed from fewer samples, so fine features are lost. While respiration is mainly low-frequency, the lower rate still diminishes detail because there are simply fewer points to capture the waveform's nuances. The other effects listed don’t reflect the primary impact of reducing how often you sample the signal; lower sampling generally reduces data volume and can lower power use, rather than increasing noise or making transmission harder.