**Deep into wavelengths, frequencies and spectrums of instruments**

This post is not very long.

It is a complement to the **fundamental concepts of sound** in which we explained about **sound**, **sound waves**, **amplitude**, **wavelengths** and **frequencies**.

Here, we firstly give you some ideas on the **dimensions of wavelengths** for different **frequencies** in the air. They are useful to know to better understand sound phenoma like: **sound absorption**, **sound diffusion**, **sound diffraction** and also sound transmission.

Then we have included a graph with **examples of spectrum** of some **instruments** and sources. This way, you can **visualise the frequencies** they can emit.

**Wavelength dimensions**

Below we illustrate **wavelength dimensions** for various **frequencies** within the **audible range** for **humans**.

These examples offer insights into the **sizes of wavelengths** associated with the **sounds/frequencies** **we can hear**.

* * **Note:** We have approximated the wavelength values by calculating them under the assumption of air as the propagation medium, at a temperature of 20 degrees Celsius, resulting in a speed of sound at 343 meters per second.”

**Examples of wavelength dimensions corresponding to different frequencies**

**Frequency**

**Corresponding Wavelength**

20 Hz

17,15 meters

50 Hz

6,86 meters

100 Hz

3,43 meters

500 Hz

69 cm

1000 Hz

34 cm

5000 Hz

6,9 cm

10000 Hz

3,4 cm

20000 Hz

1,7 cm

**Examples of spectrums**

Remember from the **fundamental concepts of sound**, “the natural sounds **blend frequencies** with **varying amplitudes**.”

We call **spectrum** (in physical terms) the **range of frequencies** a source can **emit**.

Below we have included a **graph** with **examples of spectrums** of some instruments and sources.