Change the noise made by pedestrian warning speaker

Discussion in 'Prime Audio, Electronics, and Infotainment' started by alinica2001, Nov 8, 2019.

  1. alinica2001

    alinica2001 Junior Member

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    Hello,

    I assume that the sound made by pedestrian warning system is an mp3 file stored somewhere ...
    Did anyone change that file in order to have a different sound ?
     
  2. bisco

    bisco cookie crumbler

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    not that i recall reading. plenty of people wanting to though!
     
  3. Elektroingenieur

    Elektroingenieur Senior Member

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    I wouldn’t assume that there is such a file, or that it would be practicable to change the sound without substantial reverse engineering.

    For 2016–2019 Prius and 2017–2020 Prius Prime cars, New Car Features (more info) shows that the vehicle approaching speaker assembly is connected directly to the hybrid vehicle control ECU, which I’d expect to have been designed to produce the warning sound signal in the simplest (i.e., cheapest) possible way. I’d be quite surprised if that involved either a file system or an MPEG audio decoder.

    For the MY 2020 Prius, Toyota changed the design to add a separate ECU, the vehicle approaching speaker controller, but I imagine that it, too, would have been made no more complicated than necessary to produce the sound signal and supervise the speaker circuit.
     
  4. jerrymildred

    jerrymildred Senior Member

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    I would have expected the scenario @Elektroingenieur described. It's too simple to just hard code the sound into the ECU programming to bother with the complexities of reading files, interpreting them, and sending them to a speaker. Remember the old IBM PCs and and the beeping sounds they made?
     
  5. bisco

    bisco cookie crumbler

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    however, it wouldn't be that hard to connect your phone to the speaker
     
  6. jerrymildred

    jerrymildred Senior Member

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    Well, I doubt that it would be very easy, either. And then there's the whole thing of trying to power an unamplified speaker with a device meant to power ear phones.

    And I've still never been able to hear my pedestrian warning tone, even in the garage with the windows open and the volume set to max. The one on my PiP was loud and clear.
     
  7. bisco

    bisco cookie crumbler

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    ah, time for hearing aids my friend. just picked mine up thursday, what a world of difference

    on the down side, my car became a rattletrap overnight :p
     
  8. jerrymildred

    jerrymildred Senior Member

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    LOL. Nope. My hearing is still pretty close to normal. Actually, above normal for my age. Just now starting to have to work a little harder to hear soft speech in noisy places. If I need a hearing aid to hear the pedestrian warning, then it's not much of a safety factor for the vast majority of Florida pedestrians. ;) :D
     
  9. Mendel Leisk

    Mendel Leisk Titanic Social Director

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    Ride of the Valkyries? :whistle:
     
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