FFT Applications

FFT         Acoustic analysis

S-1-2      Measuring frequency characteristics and harmonic distortion of a speaker sound

  • For measuring frequency characteristics or harmonic distortion of speaker sound, use the sine sweep signal output from DS-5000 O-Solution Sound and vibration analysis system. Measure the speaker sound of the sine sweep signal output by the sound level meter. The frequency characteristics of the speaker can be obtained by calculating the frequency response function between the sine sweep signal and the AC output signal from the sound level meter. The harmonic distortion of the speaker can be measured by using the fixed sine wave signal output from the DS-5000 O-Solution.
  • The real time octave function installed in the DS-5000 O-Solution enables 1/1 and 1/3 octave analysis.
  • MI-1235 (microphone), MI-3111 (preamplifier), SC-2500A (sound calibrator) can be used in place of a sound level meter.

Product list

  Model Product name Remarks Qty
1 O-Solution DS-5000 3ch 40 kHz Octave set DS-5100 Main Unit
DS-0523 3ch 40 kHz Input Unit
OS-5100 Platform
OS-0522 FFT Analysis Function
OS-0524 Octave Analysis Function
OS-0512 Hardware Connecting Function		 1
2 DS-0545 2ch Signal output Unit 1
3 LA-7500 High performance Sound Level Meter Frequency range: 10 Hz to 20 kHz 1
4 AG-3401
AG-3402
AG-3404		 Microphone extension cable (optional) 5 m
10 m
30 m		 1
Remarks
  The O-Solution DS-5000 needs a PC separately.
  T-type connector (BNC JPJ) for branching the amplifier (for the speaker) and signal output cable is user preparation.
  Other models of FFT analyzer can be applicable (the CF-9200A with CF-0923 octave analysis software).