If the sound is moving than the pitch will blank to the observer

corrrectooo

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hope this helpedit has 2 cells

hope this helpedit has 2 cells

hope this helpedit has 2 cells

hope this helpedit has 2 cells

hope this helpedit has 2 cells

hope this helpedit has 2 cells

hope this helpedit has 2 cells

hope this helpedit has 2 cells

hope this helped

answer; ///i believe its: ///(embolus);