### Re: Sounds of Music C

Posted:

**March 19th, 2019, 5:06 pm**It's sort of like a piano where instead of strings the hammers strike metal keys.What is a celesta

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Posted: **March 19th, 2019, 5:06 pm**

It's sort of like a piano where instead of strings the hammers strike metal keys.What is a celesta

Posted: **March 23rd, 2019, 7:54 pm**

Does anyone know what app or device will be used at most State Tournaments (particularly MI) and Nationals for pitch and volume tests? I've found that different devices and apps can give very different results, and I just want to make sure we're practicing as with the same one as event supervisors will use. Anything helps, thanks!

Posted: **March 24th, 2019, 4:08 pm**

Google Science Journal is often used although I'm not sure whether it will necessarily be used at your state tournament or nationals.Does anyone know what app or device will be used at most State Tournaments (particularly MI) and Nationals for pitch and volume tests? I've found that different devices and apps can give very different results, and I just want to make sure we're practicing as with the same one as event supervisors will use. Anything helps, thanks!

Posted: **March 24th, 2019, 4:19 pm**

From what I've heard nationals will not use Science Journal.Google Science Journal is often used although I'm not sure whether it will necessarily be used at your state tournament or nationals.Does anyone know what app or device will be used at most State Tournaments (particularly MI) and Nationals for pitch and volume tests? I've found that different devices and apps can give very different results, and I just want to make sure we're practicing as with the same one as event supervisors will use. Anything helps, thanks!

Posted: **March 25th, 2019, 8:39 am**

At my Michigan regionals they used Sci Journal, but I'm not sure what they'll do for states because it's not being used at nats.Google Science Journal is often used although I'm not sure whether it will necessarily be used at your state tournament or nationals.

Posted: **March 25th, 2019, 9:32 am**

If it was used at regionals there is a decent chance it will be used at states since the event supervisor could easily be the same person.At my Michigan regionals they used Sci Journal, but I'm not sure what they'll do for states because it's not being used at nats.

Posted: **March 30th, 2019, 7:57 am**

What resources are you guys using for studying decibels? I'm trying to help my team figure it out but it's super confusing...

Posted: **March 30th, 2019, 8:30 am**

The wikipedia page might be helpful and there's also a hyperphysics page on it: http://hyperphysics.phy-astr.gsu.edu/hb ... ntens.htmlWhat resources are you guys using for studying decibels? I'm trying to help my team figure it out but it's super confusing...

Basically, the point of decibels is to measure sound intensity in a way that is closer to how we perceive loudness, which is why it varies logarithmically with W/m^2. So if you hear a sound as twice as loud as another, the first one is roughly twice the number of decibels, not twice the W/m^2.

Because decibels are supposed to be more related to human hearing, that is also why is the value that it is. is roughly the minimum sound intensity humans can hear, so if the intensity is at (so if ), then . This makes 0 dB the minimum intensity humans can hear.

I'm not sure what part of it specifically is confusing you, but I hope this sort of general overview helps.

Posted: **March 30th, 2019, 11:06 am**

It's worth noting that decibels can denote sound pressure as well as sound intensity and so you should have reference values for both (one in pascals and one in watts per square meter).The wikipedia page might be helpful and there's also a hyperphysics page on it: http://hyperphysics.phy-astr.gsu.edu/hb ... ntens.htmlWhat resources are you guys using for studying decibels? I'm trying to help my team figure it out but it's super confusing...

Basically, the point of decibels is to measure sound intensity in a way that is closer to how we perceive loudness, which is why it varies logarithmically with W/m^2. So if you hear a sound as twice as loud as another, the first one is roughly twice the number of decibels, not twice the W/m^2.

Because decibels are supposed to be more related to human hearing, that is also why is the value that it is. is roughly the minimum sound intensity humans can hear, so if the intensity is at (so if ), then . This makes 0 dB the minimum intensity humans can hear.

I'm not sure what part of it specifically is confusing you, but I hope this sort of general overview helps.

Posted: **April 1st, 2019, 4:48 am**

We never studied logs, so that's the hardest part. I'm still a little unsure of the difference between sound intensity, sound pressure, and sound pressure level. Like...why are there three different ways of describing the same thing? Also, my team saw a question on an invite test about how many decibels something was "twice as loud" and the answer apparently wasn't twice the decibels. Maybe it was "twice as intense"? Does that make a difference?The wikipedia page might be helpful and thewe's also a hyperphysics page on it: http://hyperphysics.phy-astr.gsu.edu/hb ... ntens.htmlWhat resources awe you guys using fow studying decibels? I'm trying to hewp my team figure it out but it's super confusing...

Basically, the point of decibels is to measure sound intensity in a way that is closer to how we perceive loudness, which is why it varies logarithmically with W/m^2. So if you hear a sound as twice as loud as another, the fiwst one is roughly twice the numbew of decibels, not twice the W/m^2.

Because decibels awe supposed to be mowe related to human hearing, that is also why is the value that it is. is roughly the minimum sound intensity humans can hear, so if the intensity is at (so if ), then . This makes 0 dB the minimum intensity humans can hear.

I'm not sure what pawt of it specifically is confusing you, but I hope this sort of genewaw overview helps.

Also.....for some reason my browser is changing r's into w's and I can't figure out what the heck is going on. It's actually kind of amusing.