Speakers, loudness, and electrical input

In summary, the formula for speaker input/output is x=y and y=x, where x is electricity and y is either movement or loudness. However, the theory of x=y / y=x may not be applicable to speakers as the efficiency of the output may not be equal to the input. This is due to factors such as device limitations and variations in transducers. While there is no magic formula for speakers, manufacturers typically provide specifications for the input to output relationship, which can vary between different speakers. Additionally, speakers with a DC resistance of around 80% of nominal impedance are typically less efficient in converting electrical energy to mechanical energy. A search on "theory of loudspeakers" can provide more information on this topic.
  • #1
Steven Ellet
85
3
What is the formula for speaker input/output?

On a related topic, on a motor an input of x (electricity) equals output of y (movement) and an input of y (movement) equals output of x (electricity)
x=y and y=x
Is the theory of x=y / y=x applicable to speakers? x=electricity y=loudness
 
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  • #2
You have forgotten to include efficiency. The output of any device will never be equal to the input. And of course some types of motors will not work as generators. But you have the general idea correct. I don't believe there is any magic formula for speakers. The input to output relationship is usually a manufacturers spec and will vary from one transducer to the next. Loudspeakers are generally not considered very efficient at all.
 
  • #4
the standard measurement is 1 watt at 1 meter to get the sound pressure level that varies with speaker efficiency.
 
  • #5
Just a thought -
Speakers having DC resistance around 80% of nominal impedance are condemned to low efficiency as converters of electrical to mechanical energy..

a search on "theory of loudspeakers" should be fruitful.
 

FAQ: Speakers, loudness, and electrical input

1) What is the difference between a speaker and a loudspeaker?

A speaker is a device that converts electrical signals into sound waves, while a loudspeaker is a type of speaker that is specifically designed to produce louder sounds. Loudspeakers often have additional components, such as amplifiers, to help increase the volume of the sound produced.

2) How is loudness measured in speakers?

Loudness is typically measured in decibels (dB). This is a logarithmic scale that compares the sound produced by a speaker to the threshold of human hearing. For example, a loudspeaker with a loudness of 80 dB is 10 times louder than a speaker with a loudness of 70 dB.

3) Can I damage my speakers by playing music too loud?

Yes, playing music at high volumes for extended periods of time can damage your speakers. This is because the electrical input to the speakers causes the components to vibrate and produce sound waves. If the input is too strong, it can cause these components to overheat and eventually fail.

4) How does the electrical input affect the volume of a speaker?

The electrical input to a speaker determines the strength of the electrical signal that is converted into sound waves. A higher input will result in a louder volume, while a lower input will produce a softer volume. However, it is important to note that the design and quality of the speaker also play a significant role in the overall loudness.

5) What is the role of an amplifier in a loudspeaker system?

An amplifier is a device that increases the strength of an electrical signal. In a loudspeaker system, an amplifier is used to increase the electrical input to the speakers, resulting in a louder sound. Amplifiers also help to maintain the quality and clarity of the sound being produced by the speakers.

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