1. StefanMilosevic
36965135
Phys101-201
LearningObject10: Beats
Question:
You are tuningyourinstrumentata frequencyof 276Hz and273Hz.
A) Calculate the beatfrequency.Canthe humaneardetectthisbeatfrequency?
B) If your instrumenthasanothersoundwave of 285 Hz, calculate the beat frequencybetween276
and 285. Can the Human ear detectthisbeatfrequency?
C) You tune yourinstrumentata new frequencyof 300Hz and youhear a beatfrequencyof 5 Hz,
What isthe frequencyof yourinstrument?
Answers:
A) The beat frequencyisthe difference betweentwofrequenciessothe answeris276Hz – 273Hz =
3Hz. Yes, the humanear can detectanybeat frequenciesunder7Hz.
B) Once again,the beatfrequencyis285-276 = 9Hz, So now the human earcannot hearthis beat
frequency.
C) The Frequencyof yourinstrumentisthe absolute value of the frequencyittunesatandthe beat
frequency.Therefore the frequencyof the instrumentiseither295 Hz or 305 Hz.