Anyone who knows about the physics of how sound travels?

Jump to Last Post 1-4 of 4 discussions (9 posts)
  1. DzyMsLizzy profile image94
    DzyMsLizzyposted 4 years ago

    Anyone who knows about the physics of how sound travels?

    I have a chiming clock, which has an electronic chime. Those don't go out of tune. 
    However, though it sounds perfect in the same room, when heard from down the hall in another room, it sounds off-key; about a half-step flat.
    Any idea what might cause this effect?

  2. Bob Bamberg profile image96
    Bob Bambergposted 4 years ago

    Which do you believe, the off-key clock or your lying ears?  smile  Sound travels in waves, which, inside a building, can be distorted by features such as doorways, furniture, etc.  Perhaps you're hearing a slightly distorted chiming.

  3. tsmog profile image83
    tsmogposted 4 years ago

    I agree with Bob and add time to be considered. The time and the space traveled should be considered. There is always the illusion of sight, sound, and memory too. When you see the clock strike the hour your memory of tune or song is more than likely heard 'in a sense' with recall before the tune itself is actually played. An illusion does occur as to the perception, which is the sensing or feeling, of being heard. Or, memory may be distorted with actuality. Whereas, the perspective or the rational of logic with evidence may be an entirely different affect upon experience or experiencing the realized sound.

    That concept may be validated or not and too the tick of the tock may trigger a memory of the tune sooner than the heard or sensed tune too. Much to think and ponder. Maybe for fun you are actually hearing the 'real' sound in another room not tainted by an illusion and it really is off tune. Even though stated "those don't go out of tune" I do not accept that as a truth. But that is just me. Playing the 'what if' of the thought process maybe it is never perceived as off tune in the same room. Maybe recording and looking at the wave lengths on a free recording download would help offer a solution for fun and experimenting. Hmmmm . . . . just playing a little with pondering a solution.

    tim

    1. Bob Bamberg profile image96
      Bob Bambergposted 4 years agoin reply to this

      Very interesting point!

    2. tsmog profile image83
      tsmogposted 4 years agoin reply to this

      Thank You Bob. I was just playing in a sense remembering a long time ago. My thought came from how a car sounds at the Drag Races going by at 300MPH does not sound like it really sounds like. And, the different places along that route of travel.

    3. DzyMsLizzy profile image94
      DzyMsLizzyposted 4 years agoin reply to this

      tsmog, it sounds as if your race car analogy is about the Doppler effect; how sound seems to change pitch as it passes by you, first approaching, then receding into the distance....
      The clock is not moving; nor does it have a "tick-tock" sound. ;-)

    4. tsmog profile image83
      tsmogposted 4 years agoin reply to this

      hmmmm . . . I will have to open a science book instead of postulating smile However, and with jest, maybe just taking a half-step will bring it back into tune smile

  4. Doc Snow profile image95
    Doc Snowposted 4 years ago

    Distance won't do that, but changes in relative velocity can--were you walking when you noticed the pitch shift?

    It's called the "Doppler effect," and the classic acoustic instance is the sound of a train whistle, which is higher approaching you and lower receding.  It's not specific to sound, though:  the same phenomenon is responsible for the red-shifts of the spectra of stars as they recede from us due to the expansion of the universe.

    Also, and theoretically at least, temperature differences could cause some pitch shifting.  That's because frequency depends on the speed of sound, which changes with temperature.  But off the top of my head, I doubt that the effect would be as large as the semitone you mention for an reasonable temperature differential between rooms.

    Finally, I wonder if the change could be due to greater attenuation of higher frequencies making a 'lower' sounding tone--sort of an audio illusion, if you will?  Sometimes psychoacoustics are sort of slippery...  it's a theory, anyway!

    1. DzyMsLizzy profile image94
      DzyMsLizzyposted 4 years agoin reply to this

      Yes--I mentioned the Doppler effect in a comment above.  And no, I was not walking; I was lying still in bed.

Closed to reply
 
working

This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

Show Details
Necessary
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
Features
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Marketing
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Statistics
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)