Blow a whistle in their ear

The term is figurative in that context. A "whistleblower" is someone who exposes the suspicious or illegal activity of his or her employer. Often these gadflies get fired for not cooperating with said bad behavior, leading to wrongful termination lawsuits. A law firm could choose to specialize in representing the "rogue" employees or in defending companies against whistleblower claims.

Shill! Whistleblowing transmits at the same volume and bandwidth on telephony as other speech range sounds.

I do not believe you are very clever at all for you exhibit the classic symptoms of terminal rectal cranial insertion from such belief in a crackpot theory that blowing a whistle will do better than simply ignoring the offending call and not answering!!!

You are a fool.

I don't read that as advocating the whistle practice but debunking of fearmongering. "Clever" is in agreement with others who have described technical barriers to generating any noise via the phone sufficient to damage hearing.

The only plausible vulnerability I can see is at the call center, where a headset might be turned up very high to drown out chatter from the other dozens of employees. In such a case, it would be harder to place blame on one noise incident for hearing loss as measured by an audiologist.

Redident47:  I appreciate the clarification.

It's not the charities and political calls, it is Rachel or Brittany who call about lowering your interest rates.  I have done everything possible to get them to stop.  I have even talked to them and kept them on the phone for as long as possible until they hang up on me.  doesn't do any good.

Why do you even answer the phone? if you don't know the number, don't answer the call. If it's important, they'll leave a message and you can decide whether or not to return the call. There's no law anywhere saying you have to answer your phone. And if it's your job to answer the phone, as it is mine, simply say "no thank you" and hang up. You don't have to deal with scammers or telemarketers.

Instead of the whistle, let out the highest-pitch scream you can muster.  You get plausible deniability (rat in the house startled me, was watching a horror flick, read a text indicating your best friend died, the list goes on and on) AND the satisfaction of pissing some telemarketer off.  Best of all worlds.

Sally your rediculous...

The telephone lines can only pass the signal to the receiving equipment.  Whatever they hear is limited to whatever volume they have set it at. Think of it like the annoying commercials on TV - they crank all of the sounds to the max but your volume still controls how high it is in total.
But if you want to blow the whistle at them the best way to get them is to speak very softly to them....and tell them you are having a hard time hearing them...(.but still speaking very softly and nice) .Say "what"?  a few times ...(very softly)......Then finally blow the whistle in their ear ......and hang up.
Now doing this to the scammers is best....and most of the Charity scammers as well.
If it is a one of the charities I give to I simply tell them I do not give anything over the phone. You have to mail me.  (sometimes they are not really the charity that they claim to be and you will never see anything in the mail...)

Yeah we have heard that one before as well.  The fact is that the telephone lines are not capable of passing through a noise so loud that it actually injures someone.  But thanks for trying to perpetuate the myth.  After all much better to do that than to actually offer some helpful advice.

What did you expect from what looks to be a troll trying to be you?

I noticed that as well.  Can't wait to see what the reply is.

Charities are businesses.  Check on how much the CEO, CFO or manager makes.  Some are worthwhile, but all are businesses.  Billy Graham said it best when he told folks to give to local churches, they know your neighbors that really need help.