What does the frequency response of speakers mean?

A speaker’s frequency response range is a measurement of how wide a selection of sounds it can reproduce. The human ear is capable of hearing sounds from 20 – 20,000 Hz. The lower the number the lower the tone and vice versa. Most speakers are capable of responding from around 45 – 20,000 Hz.

What waves do speakers emit?

Sound moves in pressure waves. When air particles are compressed and rarified fast enough, we hear it as sound. When a speaker moves back and forth it pushes on air particles which changes the air pressure and creates sound waves.

How do speakers produce multiple frequencies at once?

The way that sound works is you can superimpose the motion of the speaker – meaning lots and lots of different vibrations – and that will produce sounds of lots and lots of different frequencies all at the same time, by just making the right pattern for the speaker to move back and forwards.

What is a sound frequency?

Frequency, sometimes referred to as pitch, is the number of times per second that a sound pressure wave repeats itself. High frequencies produce more oscillations. The units of frequency are called hertz (Hz). Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz.

How do you find the frequency response of a speaker?

Ideally, frequency response should be measured in an anechoic chamber with the loudspeaker under test driven with a sine wave signal slowly swept through the audible frequency range of 20Hz to 20kHz. A microphone placed on a preferred axis in the far-field of the loudspeaker will then record and plot the output.

How does a loudspeaker produce a sound wave?

Alternating current supplied to the loudspeaker creates sound waves in the following way: a current in the coil creates a magnetic field. repeatedly alternating the current direction makes the cone vibrate in and out. the cone vibrations cause pressure variations in the air – which are sound waves.

How do we hear multiple sounds at once?

It is entirely possible for several hair cells to be stimulated simultaneously so that you hear several frequencies at the same time. the human ear separates out and detects all the frequencies within its range individually (in parallel) in real time, and sends that decomposition to the brain along a bundle of nerves.

What is the spectrum of a sound?

A sound spectrum is a representation of a sound – usually a short sample of a sound – in terms of the amount of vibration at each individual frequency. It is usually presented as a graph of either power or pressure as a function of frequency.