Recent content by NIDH

What are the size limits (volume) for each type of speaker: omnidirectional or directional?"

Thank you 🤗

When I measure, what type of speaker should I use? I have a speaker with a frequency range of 55Hz to 40kHz, and 120W which is directional. Should I use this or an omnidirectional speaker ?

In the guidelines, there is a recommendation for room sizes. For rooms under 50 square meters, a reverberation time of 0.3 seconds is needed. This means that small rooms have a maximum size limit of 50 square meters. Rooms above that size are reconsidered large. What i wanna to know the maximum...

Yeah but i think the most reason is external noise make my measurement too hard sametimes. Thank you john for clarify informations 🙏

So if I find this phenomenon, like you said, in small rooms, for example: Should I use Topt and clarity and waterfall results as references after I correct my room with absorption material for each point i measure ? Or do I need to look at RT60,RT30,RT20 too how they change as well ? What is...

That's what I am asking about, and I mean to correct some informations. What I understand with the Schroeder integral is that this relationship is not correct. So, the RT60 = 2 × RT20 is a fault. This is because at a short time, RT20 of reverberation is not the same as the reverberation time...

Yeah i understand. But I'm confused about how RT20 in 150hz for exemple has values bigger than RT60 or RT30 too. But in full range every thing okay. What i ask does this normal results. Or i need to change same parameters before i measure. like change IR to 4s or 9s 🤔

Thank you John

I did some measurements, around 28 points, and found that in the 1/1 and 1/3 octave bands, some values of RT20 are larger than RT30 and RT60 results. Some results of RT30 are larger than RT60. What is the reason for these values in 1/1 and 1/3 bonde octaves? What I know understand that...

Yeah i check it but was confuse about it same thinks. And for EDT or ts or D50 the same think arithmetic methode i could use ? And for C80 and C50 the log formulas i sent, is it correct , i could use it. or does other methode for calculate their selected averadge ?

What I understand is that we can't calculate the full range of RT60. Why is it possible for T30 and T20? For other parameters, how can I calculate the average? For example, if I measure 3 points, how can I calculate the average for C80 or C50 for dB results? Does the formula...

I need help with exporting data for my university project. When I export data for RT60, RT30, RT20, EDT, C50, C80, and D50, the full range value of RT60 is zero, but the other values are okay. I'm confused about the correct method to calculate the full range of RT60, as well as EDT, C50, C80...