2006-11-25 23:56:03 · 4 answers · asked by raj 7 in Science & Mathematics ➔ Physics
I assume you mean the resonant frequency.
There is no resonant frequency for air, because air is not rigid. Sound resonance depends on the cavity that contains the air, such as an organ pipe.
2006-11-26 00:33:16 · answer #1 · answered by poorcocoboiboi 6 · 7⤊ 0⤋
Natural Frequency:Consider a mass m hung by a spring.Now just slightly stretch the spring and leave.The mass will start up-down harmonic motion.The frequency of oscillation will be n=(1/2pi).sqrt(k/m) mass of the block and k=spring constant. Another example is of simple pendulum its frequency is n=(1/2pi).sqrt(g/l) g=accn due to gravity.l=length of pendulum the fact to be noticed here is this frequency purely depends on system parameters(k,l,g,m etc) Now resonance is a phenomena when on natural frequency if we superimpose a periodic force of the same frequency,then system will oscillate with the natural frequency but amplitude will be large so more intensity.Take for example guitar or Sitar.Now when we pluck the string it vibrates at its natural frequency,but the air in sound Box will also star vibrating with the same frequency because the oscillating string passes on it vibration to the air inside the box.Now if the box dimensions are such that its natural frequency is equal to string's then we have a resonant vibration of air inside the box and we here amplified sound.
2016-03-12 23:19:34 · answer #2 · answered by ? 3 · 0⤊ 0⤋
hey, i was little confused abt ur question.generally we calculate the frequency in air of other bodies.i don't know how t o calculate freq. of air.
2006-11-26 17:18:46 · answer #3 · answered by praveenplp 2 · 0⤊ 0⤋
ha ha gud joke
r u serious bout the question?
2006-11-26 06:50:15 · answer #4 · answered by sachin 2 · 0⤊ 5⤋