What are phons and sones?

The unit of phon is based on sound pressure measured on a logarithmic (dB) scale. Sone is a more linear scale of perception. Increasing loudness by 10 phon increases loudness in sone by a factor of 2. (This is true for sounds louder than 40 phon.

How do you calculate loudness level in phons?

If 1000 Hz is chosen as a standard frequency, then each equal loudness curve can be referenced to the decibel level at 1000 Hz. This is the basis for the measurement of loudness in phons. If a given sound is perceived to be as loud as a 60 dB sound at 1000 Hz, then it is said to have a loudness of 60 phons.

What do phons measure?

Phon. A unit used to describe the LOUDNESS LEVEL of a given sound or noise. The system is based on EQUAL LOUDNESS CONTOURS, where 0 phons at 1,000 Hz is set at 0 decibels, the THRESHOLD OF HEARING at that frequency (see graph).

How many decibels is a phon?

Audio devices and mobile phones including iPhone have a sound level of 100 dB or louder. iPhones can produce a maximum of 115 decibels (software limits European iPods to 100 dB; U.S. models have been measured higher), the equivalent of attending a rock concert amplification.

How many sones is 40 decibels?

One sone
Defining the Sones Rating One sone is equal to about 1,000 Hz with a sound level about 40 decibels above a normal reference level. In other words, a sound that delivers over four sones is about four times louder than the normal reference level.

How do you convert sones to decibels?

dB = 33.2×log10(Sones) + 28 That may come in handy when you’re figuring out what does Sones means for fans. Example: A bathroom exhaust fan has noise levels of 1 Sone.

What is .3 sone in dB?

10.64 dB
This means that 0.3 Sone is equal to 10.64 dB.

What is the difference between phon and deciBel?

By definition, 1 phon is equivalent to 1 deciBel at 1000 Hz (1 kHz). Figure 1 shows several equal loudness curves. The curves were determined experimentally. Volunteers were subjected to a 1 kHz sound at 60 dB; this is a loudness of 60 phon.

How loud is a clap in decibels?

[32] measured the levels of acoustic sources and found the handclap to be one with the lowest. In another study by Seetharaman and Tarzia [33], the handclap averaged 26.4 dB above the background level (in a concert hall with typical background noise levels) with a standard deviation of 4.4 dB across measurements.

Can you make a 1100 dB sound?

It’s not possible as a continuous sound in air because the maximum overpressure is double atmospheric, with the troughs a vacuum, which works out at 194 decibels.

What does 4.0 sones sound like?

Here are some examples of sone measurements: 4.0 sones is the sound of normal television (which would be ridiculously loud for a normal bathroom fan, though I’ve heard some this loud!) 1.0 sone is the sound of a quiet refrigerator (about as good as it gets!!)