If a radio show about the rainforest was broadcast in my house, could a nearby dog hear things at frequencies I'm not sensitive to? Could I use a basic tape recorder to run experiments on bats' ultra-sonic communication techniques?
2007-02-02 10:15:59 · 7 answers · asked by Loves Papillons 3 in Science & Mathematics ➔ Physics
You would need special equipment to do that. The typical recording devices is meant to capture what matters to the end user, and those end users are humans, so they are not really designed to record frequencies that are higher than 20 kHz.
Moreover, the pick-up itself, the microphone, will also have its own set of limitations, linked with the size of the vibrating components that capture sound energy.
Even more limitating is the digital recording, as CD's, for instance, encode sounds with 44100 samples per second. This effectively limit the highest frequency that can be properly recorded to 22 kHz (and even then, with only 2 samples per wave, there will be digital artifact galore, and the reproduced sound will be drifting between frequencies and sounding awful -- well at least to intrumentation as no normal human would be able to pick it up).
2007-02-02 10:27:59 · answer #1 · answered by Vincent G 7 · 0⤊ 0⤋
The sound on a tape recorder is often recorded as a modulated high frequency carrier. The higher the sound frequency recorded the poorer the recording will be. Digital sound recordings are also recorded in frequencies just above human hearing and these too are probably unsuitable unless you can set the sampling rate above the targeted range of frequency. (Also many microphones will not respond to these frequencies and ordinary speakers do not respond to these frequencies either) There are many fixed frequency transducers that can be purchased cheaply and microphones designed for this purpose.
2007-02-02 10:29:38 · answer #2 · answered by a simple man 6 · 0⤊ 0⤋
Just like there are cameras specially designed to pick up infrared light, some sound devices are designed specifically to record ultru high or ultra low sound frequencies. The typical tape recorder should pick up some frequencies just below and just above the audible range.
2007-02-02 10:20:30 · answer #3 · answered by bruinfan 7 · 0⤊ 0⤋
The recording equipment may pick it up, but the frequency response of most audio speakers is 20 hz - 20 Khz. This is the normal range of human hearing. It might be on the recording, but the speakers probably won't reproduce it.
2007-02-02 10:24:29 · answer #4 · answered by davidosterberg1 6 · 0⤊ 0⤋
Yes, they do. The range of a microphone/loudspeaker is a lot wider than that of your ears. Nevertheless is the range of a microphone focused on the wave-range of the human voice. So you probably need a mic which is esp. aimed on the wavelength. The loudspeaker is able to produce it anyway. The tape just don't care which wavelength you record.
2007-02-02 10:28:17 · answer #5 · answered by malamut68 1 · 0⤊ 0⤋
I even have that situation too. it must be the reality that your recorder or digicam is of low high quality. i found that as quickly as i began recording with an iPad that it helped the priority. Your voice getting deeper would not quite have something to do with this. i think of your sister is appropriate. in case you like making a track, then save doing it, no rely what human beings say. :)
2016-11-24 19:54:43 · answer #6 · answered by ? 4 · 0⤊ 0⤋
Animals hear sounds we can't hear right? So why wouldn't recording devices?
2007-02-02 11:18:42 · answer #7 · answered by Anonymous · 0⤊ 0⤋