This video was fantastic, great sweeping overview and introduction to acoustic analysis. Well done! Please keep generating videos like this so that we can all learn :-)
Wow, this was a great explanation! I’ve been researching devices measures in sones instead of decibels, but don’t have any previous experience with sones… which lead me here. Thanks for such a relatable explanation using real examples and data!
Thank you for your feedback. There are also devices that can do both and calculate the sone and decibel values for each measurement. We show such a device, for example, from the second half of this tutorial on calculating decibel values. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4LaxZebh7Ro.html Both loud noise and low-noise microphones can be connected here to correctly evaluate every kind of noises in decibels or sone.
Great video! Just started studying acoustics and whilst I haven't encountered a lot of things in the video, there are plenty of fundamental stuff which is of great help.
Thank you Head, you provided excellent examples and a very good way to display the small sounds that can be annoying that we hear and yet cannot display in dB(A) measurements. Sones are best to display if the noise has components that could be heard by the human and be aggravating, especially useful for psychoacoustic analysis. I am really liking your videos and your software. Maybe one day I will be able to try out the Artemis Suite.
Thank you for your detailed feedback on our tutorials and analysis software. We are pleased to read how you have seen the advantages of advanced analysis over the more common sound pressure level and third octave analysis. On this channel you will find more recommendations for valuable analyses and quick evaluation of measurements. You might ask for a test version of ArtemiS SUITE. Enjoy!
Test a gas stove at, e.g., five different powers. Record the acoustic signal and the sound pressure level [this latter will not be a precise value, but their ratios will be]. For the acoustic signal, you can use, e.g., the Spectroid or Spectrogram app (there are a lot of apps out there to do FFT on the microphone signal). For the sound pressure level, you can use, e.g., the Andro sensor app. Evaluate the measurement result
The same app on different smart phones leads to completly different values (level and spectrogram). Using an app on a smart phone will never lead to a calibrated value you can rely on.
Good day, you have already recognized this correctly. The averaged sound pressure level is used to assess possible hearing damage caused by sound. Which weighting - as dB(A) or db(C) - is regulated, for example in Germany, by the Noise and Occupational Health and Safety Ordinance. As also explained in the video, dB(C) values are used for high level peaks. For continuous exposure to sound, the ordinance prescribes dB(A). It is best to consult the noise protection ordinance of your country. We hope we could help you with this.
Thank you for this very interessting an good way of explaining this topic. Two questions are still left in my mind: 1. Is there something like limit/value in sone which explains if a noise/tone is "okay" or "not okay"? 2. Is there a equivalent of loudness which ist somehow related to the dB(A)? It would be great to hear from you!
To your first question, no. It depends on the application: An air conditioner at night has a different limit than a sports car at full throttle. A sound is good if it meets human expectations. That's why I advocate loudness. It's not about energy. It's all about the human perception of sound.
hello sir, what is excatly meant by AVERAGE in the sinusoidal sounds FFT plotting? Is the graph plotting Leq or you just meany by it : fundemtnal harmonic == average
Hello, to the different sinus tones we applied the standard analysis FFT( Average). So there is one averaged spectrum calculated for the whole time length. Alternatively, there are, for example, the analyses FFT (peak hold) - showing the highest level for each freqeuncy - or FFT vs time - showing the spectrum over time in a 3D-plot
@@HEADacousticsInternational thanks sir! Another question please: if i have an fft array of N input pressure values(sampling), is the array normalized and compensated by removing negative frequencies good for measuring LAeq? I have a determining end of year engineering project: I'm planing on calculating for each bin the corresponding Leq(LAeq by changing gain with application of values given by standards), and that's by supposing the ambiant sound consisting of N incoherent sinusoidal sound tones as you said(N number of samples), then summing the LAeq of different bins by the same formula used for summing of sound pressure levels from different sources.
Such a question cannot be answered in the course of a RU-vid chat. Here we present and discuss ready-made customer solutions. You can contact our engineering service department with questions about the calculation method. engineering@head-acoustics.com
I have been using the ArtemiS SUITE software for years to analyse noise and vibrations. It's all in there and it's easy to use from day one. If you are interested, you can contact the company at www.head-acoustics.com and ask for more information or test possibilities.
It was very informative, thank you very much. I have a question. I am trying to create my own sound level meter I have a loudness sensor (Grove loudness sensor ) and want to calculate the dB SPL from the Sonsor readings (ADC values). How can i get it?
Dear Mrs. Al Fahil thank you for your feedback. We like to discuss your detailed questions via email with you directly. Please send your questions to social-media@head-acoustics.de to get in contact.
