Ok well as I service customers vehicles from long past and still often as then least test drive often times to find those all to ominous and mysterious clashes, bangs clinks screeches etc., and all sort of Gremlin produced sounds. with the customer I still suggest before more speculation that the OP really needs to answer my questions.
Hearing better (if there was actaully real empiriacl information and not posted internet info with no research write ups, (at least that I found but I am not interested to seek further) comparing men to woman is still useless if they can directionally place the sound and know a little what they are listening for. I wont get into the frequencies that can deflect or reflect the actual location of the original sound. Low frequencies are none directional where higher frequencies are directional. So that fact negates the women are better over men in your example to find a noise! .

 

Below
Sound becomes non directional below 80 Hz . The OP describes the sound as a chirp . A chirp is more than likely well above 80 hertz, as in a bird chirping . As far as most Woman's ability to hear very upper mid and high frequency sound , it has been documented. When ever I purchase new Audio speakers I always get a woman's opinion ,they have always be able to detect high frequency that is shrill ,annoying ,and fatiguing sooner than myself and other men. I have a hearing test every year and have perfect hearing that is normal for a man. FWIW ,Wilson audio always has a woman listen to all their new speakers B4 they release them. Women and dogs can indeed hear higher frequency sounds better. Normal human hearing is 20HZ to 20KHZ a chirp sound is going to be certainly above 80 HZ and should be directional . Having a number of people with good hearing go for a test drive in the vehicle could settle this and either support the Dealer tech theory of where the chirp sound emanates or not. Pure logic dictates the more people listening to it the better chance of detecting the location. Especially as they will have no $$cash incentive to rip the dash apart. All im saying is , GET A SECOUND,THIRD,OR 4TH OPINION, B4 paying the dealer a ton of money to rip the dash apart .

 

LOL auh ok.... maybe you should go to work in a service shop cuzz you can find all the answers based on a simple and less detailed post. OR maybe a stereo shop? LOL I think I have posted about sounds and what when and where they can be herd from and how on a few threads. Maybe you found that info and decided to post it in yur info about the low sound frequencies. LOL

BTW the OP has not returned since joining and starting this thread.



Response like these and the information about sound reminds me of the movie Apollo13 when crew was describing the sounds to the command center. ROLMAO!!

Apollo 13 | "Houston, We Have a Problem" - Bing video

 

Been there done that ,have the T shirt. I Worked at a Konner Chevrolet in the 70's as a tech/mechanic ,I owned and operated a used car lot in Phoenix for over 25 years , I was a ADEQ certified emissions tech, and am a long time Audiophile.
My understanding of automotive issues /repairs is quite good . And one of my many hobbies is Audio. As I have said I always take the logical solution to any problem, and never depend on only one opinion or diagnosis .Weather it's Doctors, Dentists' so called techs/mechanics, or Attorney's. in the end it may very well be in the dash, but I would want to know for Shure B4 I throw a lot of my hard earned dollars at it. You and I know full well ,if the Dealer tech pulls the dash out and doesn't find and fix the problem the customer will still have to pay for it. And if it is a wrongfully diagnosed trans, exhaust system, or suspension, issue the customer will than have to pay for that if it's not a warranted part like the trans. Now if the dealer is willing to guarantee dismantling the dash will solve the problem ,and give an accurate fair estimate of the cost and the customer is willing to pay for it then the customer should let them do it. I don't claim to be the ultimate authority on everything ,but I am always looking for the most logical, cost effective solution B4 I leap . as far as your statement BTW the OP has not returned since joining and starting this thread. Maybe the problem chirp stopped, he got used to it or he had it fixed and decided to move on.

 

I cant respond because with all the information you keep posting I could spend endless hours debunking. I already have to many on this forum now that post DIY wisdom and even from some that are suppose to be experienced.
I do see you view a world that is one way mostly your way and your belief systems and not really HOW_IT_WOPRKS in the real world for the most part.
I do enjoy your responses they most certainly make me laugh and ALWAYS makes me smile.
But again I must point out that the OP has not returned to this forum and this thread he/she started.
Its just you and me bud! LOL

 

The world is what it is and shows no sign of changing for the better ,and smart people who don't wish to be a victim of greed question and analyze everything ,because everyone has their own agenda and is scrambling for a buck $$$$. You and I seldom agree , and I'm glad because i would hate to have become be that Omnipotent .

 

I really agree with you on one this point. I am old school with customer service providing and will help you out anyway I can and often do service work or just categorially handyman type repairs things for free and never look back. The world has IMHO become a a place of distrust and question everything. The internet is a world that you WILL find the answer to anything in your favor and that makes it difficult at times when you are helping because everyone becomes an expert on the service ,process or subject material. I am happy that ITRW (in the real world) people that don't know sheeet don't talk smack but will still often go to a corner and get on their cell phone to access the internet for a come back answer. LOL
There has been a few time a customer will come into the shop with a printed copy of a procedure or what they think is wrong with their vehicle. I always oblige them and tell we have a vacant bay you can rent that includes the use of tools as long as you sign the disclaimer. As you seem to know what is wrong with your car might as well save yourself some money and repair it yourself. LOL More then half the time they are so wrong about what was their service issues need ing done and are thankful we did not follow their internet wisdom!

And don't get me started on retail sales of performance auto parts where EVERYONE that buys them is an expert knowing all about them and how to install them..... NOT! LOL

 

Huh...what did you guys say?????

 

Either demand to take the foreman for a road test and demonstrate the issue or find yourself another Mazda dealer.

I know exactly what noise you are referring to at the mention speed, & from memory, the transmission changing from 3rd to 4th gear.

Each one I've been in involved in has resulted in Mazda head office authorising a complete new transmission.

 

This explains my wife's constant complaining about high treble...