Questions tagged [measurements]

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0answers
18 views

How can I measure the sound intensity outside my house?

If I wanted to measure the noise outside of my house, in decibels, let's say I want to take a reading every second for one month and record these measurements in a file: a CSV file or something of the ...
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0answers
28 views

Directivity index measurement - steps to follow

I am interested in measuring the directivity index of a loudspeaker. I have been looking on the Internet information about the setup, but unfortunately the information I have found so far has to do ...
2
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1answer
445 views

Unrealistically low round-trip latency measured

I am trying to determine the roundtrip latency of a dusty old Toneport UX8 audio interface I have laying around, and I am getting some unexpected results. I am testing using CEntrance ASIO Latency ...
3
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1answer
135 views

cheap hand held sound meter vs smartphone app

For learning purposes i want to play around with a sound meter. Are the smartphone sound meter apps (have a droid 2) that accurate? Is a $30 hand held sound meter usually going to be more accurate?
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3answers
3k views

DIY Portable Anechoic Chamber

I would like to perform some measurements of the microphones (i.e. frequency response, SNR, etc.). First and best option would be to use the Anechoic Chamber- obviously this is not an option because ...
3
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1answer
1k views

Decibel levels of animals

Im looking for some kind of list with DBSPL Levels of different animals. How high they shout, scream or sings. I've got a feeling there's something like that out there somewhere but google isn't my ...
4
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1answer
1k views

What is the difference between dBFS and dBu?

What is the difference between dBFS and dBu for leveling when it comes to final mix and standards for cinematic release? I know that each country is different. In South Africa, the spec for ...
11
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2answers
3k views

What do sensitivity measurements of microphones really mean?

Microphone sensitivity is usually measured in mV/Pa. If one mic is say 25 mV/Pa and another is 13 mV/Pa how much more sensitive is it in application? How can I figure out how much more gain the mic ...