can the sound be heard by humans?
754888
No. The frequency which is emitted is higher than the frequency which can be heard by humans
754889
Hi Marilyn, Humans can not hear the sound. A red light comes on when you walk in front of it, but you can not hear it. It can cover up to 30 feet so they claim.
754890
the sound can not be heard by humans, I have one in my yard, it dont help much ,maybe if I hat 4 it woud. ???
754891
No, and the animals (deer, woodchucks, and more), if they can hear it, ignore it completely! It's useless.
754892
i purchased one and when I move in front of it, I can clearly hear the loud screeching sound it makes. the place where I bought it, was very cooperative about exchanging it, saying it must have been defective, however the replacement one can clearly be heard by humans ears also. There are no directions or settings other than rechargeable vs normal batteries
1397284
No. But when you are listening to music with them you cant hear anything else
1082483
Idk but when around a lot of ppl and turn them up u can't hear them. Just having them on without music, outside noise is very low.
1501540
Ma'am:I am hearing disabled and I cannot answer that question. I don't think it would be loud enough to be heard in the next room, as you asked.Sorry if I am not able to answer the question completely.
1709068
I don't think so. If it is too loud, you could try setting a glass over it. Even though I wish it were quieter sometimes, there are other times when I am glad that I can hear it when I am not close to it.
1616467
It's evidently not a sound audible to most humans. I can hear it. There's a very slight dry-rubbing sound caused by friction when it moves against different surfaces. I must have really good ears :P
1992489
No. but the sound is so incredible you probably will not have it as loud as you think. and- having it so loud you will not hear anything or anyone around you so be careful with that.
1591693
it's not totally silent, but for the real sound it will need to be connected to an amplifier.
1494532
Yes, it can be heard especially if you choose certain alarms. We mounted it I our kitchen and we could hear it in our bedroom.
1263071
I doubt it though it hasn't been tried. My reasoning is that I can hear them. With that in mind if I can hear them while not wearing them it seems that the noise interference would interfere. How old is the child? Perhaps Ear buds are a better way to go!
1450708
Depends on the sound system the theater has. Step into the theater and see if you can hear!
1523376
Hi Judith, if your question is about if people around you will hear the music playing on the headphones, in connection with the Noise Canceling feature, then yes they will be heard, specially if the volume is high. -Vincent
1264545
It can make a fairly loud sound. there is a volume control so you can adjust it level of sound.
915916
Oh yes it can be heard n the other room. Its as loud as a smoke detector or louder.
737191
The sound is somewhat muted through the sheild but you can still hear it. You can use external speakers
585557
Yes, I can hear it when I am outside the car. But it is not int the 'piercing' range of human hearing, and it is not particularly annoying. My dogs clearly hear the alert, but they are used to it and it they respond to the sound without fear or frantic behavior. We have a switch on the dash to keep its use to a minimum. It is not a whistling sound at any time! It is a combined high pitched reverb with soft undertones of rattling. We like them well enough to now have THREE installed.
1237221
Definitely not if they are behind a wall. Even if it is thin. There is plenty of sound leakage, but if they are not in the same room I cannot imagine they would be able to hear it.