Frequency response formula

[aaramburu]

Hello!

I have done the following experiment to find out the frequency response of a "box":

• I have introduced a sound speaker inside a box emitting pink noise-->I have measured the noise using the "sound and vibration assistant" and a microphone( the microphone is also inside the box)
• Then I have put the microphone outside the box and I have emmited pink noise again (the sound speaker is inside the box)

With these datas I want to calculate the frequency response of my box so I am using the "frequency response step" of the sound and vibration assistant software.

My question is: The unit of the amplitude graph of is "dB ref 1E+0" Could someone tell me which is the formula to calculate the frequency response of my box and obtain the units of "dB ref 1E+0"???

Thank you!

[dSierra]

Hi,

The response you are getting is represented in terms of dBs referenced to 1 unit of the stimulus and response signals you are getting. If you want to reconvert to natural units, you just have to invert the equation 20 log (FreqResponse/1 unit (stimulus/response)).

Best regards.

[aaramburu]

Hi dSierra,

Sorry but I do not understand when you say : "If you want to reconvert to natural units, you just have to invert the equation 20 log (FreqResponse/1 unit (stimulus/response))". Could you explain a little bit more please

Thank you!

Best regards