How does frequency work

You have to know how to read a graph. No excuses. If you paid attention in Mr. Look at Figure 1. This chart tells you what frequencies roughly correspond to bass, midrange, and treble sounds. Now look at Figure 2. The black line is a speaker or headphone with excellent frequency response. Figure 3 shows what response curves look like that correspond to various commonly-used subjective descriptions. All other products or company names are trademarks or registered trademarks of their respected owners.

Privacy Policy Terms of Use. Recording Monitors Headphones View Accessories. Company Info Careers. When a reader emits radiofrequency signals , it causes variations in the electric and magnetic fields.

This coupling is known as inductive coupling. Inductive coupling is the communication process used by LF and HF passive tags. This is called backscatter passive communication or backscatter modulation. The term «energy» refers to the radio frequency signal strength. The basic unit of energy is the watt. However, in the RF world, we talk about power in terms of milliwatts, shortened to mW. Performing calculations using the decimal form of milliwatts can be tedious, so the standard is to calculate in decibels, or in powers of ten.

As you see, sound frequency is determined by the way in which sound waves oscillate whilst travelling to our ears, meaning that they alternate between compressing and stretching the medium, which in most cases is air. In the same medium, all sound waves travel at the same speed. Squeaky sounds, like the blow of a whistle or a screaming child, oscillate at a high frequency, resulting in oftentimes deafening high-pitched sounds. The low rumbling of a nearing storm or a bass drum, on the other hand, is produced by low-frequency oscillation, so we hear it as a very low-pitched noise.

How is sound frequency measured? The total number of waves produced in one second is called the frequency of the wave. The number of vibrations counted per second is called frequency. Here is a simple example: If five complete waves are produced in one second then the frequency of the waves will be 5 hertz Hz or 5 cycles per second. Also called infrasound, low-frequency sounds stand for sound waves with a frequency below the lower limit of audibility which is generally at about 20 Hz.

Low-frequency sounds are all sounds measured at about Hz and under. A high-frequency sound is measured at about Hz and higher. The answer to this question is clearly no. You might suspect, that the higher the frequency, the louder we perceive a noise, but frequency does not tell us how loud a sound is.

Intensity or loudness is the amount of energy of a vibration and is measured in decibels dB. If a sound is loud, it has a high intensity.

Learn more about measuring the daily noise of our lives in decibels here. Healthy young adults should be able to hear frequencies anywhere between 20 and The most important frequencies for speech and language are between and Hz.

Normally, this threshold for loudness is between 0 dB and 20 dB. But the hearing threshold of sound frequencies varies from one individual to another.