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Headphones
How impedance and amplification of headphones are connected ?
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<blockquote data-quote="xenithon" data-source="post: 751394" data-attributes="member: 467"><p>?Loudness? is directly related to the impedance and sensitivity of the headphones. Impedance determines how much power the headphones will draw, while sensitivity indicates how much of the electrical signal delivered to the headphones is converted into sound. Because low impedance headphones draw more power from the amplifier they will sound louder, at the same control settings, than high impedance headphones. Also, headphones of higher sensitivity will sound louder than those of lower sensitivity. </p><p></p><p>In terms of the headphone sensitivity and impedance (efficiency) ? more technically, sensitivity describes the sound pressure level produced when a certain voltage is applied (dB/mV), whereas efficiency tells you the sound pressure level produced when a certain power is applied (dB/mW). You can use these to determine the expected volumes at certain power outputs. But again, not so simple, because the power output varies significantly depending on the source device, volume, impedance of the headphone, and across the frequency spectrum.</p><p></p><p>Technical detail here: <a href="https://benchmarkmedia.com/blogs/application_notes/14017381-headphone-impedance-and-sensitivity" target="_blank">https://benchmarkmedia.com/blogs/application_notes/14017381-headphone-impedance-and-sensitivity</a></p><p>And even more here: <a href="http://nwavguy.blogspot.co.za/2011/02/headphone-impedance-explained.html" target="_blank">http://nwavguy.blogspot.co.za/2011/02/headphone-impedance-explained.html</a></p></blockquote><p></p>
[QUOTE="xenithon, post: 751394, member: 467"] ?Loudness? is directly related to the impedance and sensitivity of the headphones. Impedance determines how much power the headphones will draw, while sensitivity indicates how much of the electrical signal delivered to the headphones is converted into sound. Because low impedance headphones draw more power from the amplifier they will sound louder, at the same control settings, than high impedance headphones. Also, headphones of higher sensitivity will sound louder than those of lower sensitivity. In terms of the headphone sensitivity and impedance (efficiency) ? more technically, sensitivity describes the sound pressure level produced when a certain voltage is applied (dB/mV), whereas efficiency tells you the sound pressure level produced when a certain power is applied (dB/mW). You can use these to determine the expected volumes at certain power outputs. But again, not so simple, because the power output varies significantly depending on the source device, volume, impedance of the headphone, and across the frequency spectrum. Technical detail here: [url=https://benchmarkmedia.com/blogs/application_notes/14017381-headphone-impedance-and-sensitivity]https://benchmarkmedia.com/blogs/application_notes/14017381-headphone-impedance-and-sensitivity[/url] And even more here: [url=http://nwavguy.blogspot.co.za/2011/02/headphone-impedance-explained.html]http://nwavguy.blogspot.co.za/2011/02/headphone-impedance-explained.html[/url] [/QUOTE]
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Audio and Video Talk
Headphones
How impedance and amplification of headphones are connected ?
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