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#1
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Sennheiser HDA-280 Audiometric Headphone
Stumbled upon this by accident. Has peak SPL of 117dB(!) and most
literature about it seems to indicate it is for testing frequency sensitivity strictly between 20Hz 12kHz. Sennheiser specs it out to 20kHz. The graph on their site suggests ruler flat freq resp down to 100Hz, but above 2kHZ it seesaws(mostly downward, with a nasty trough around 5-7kHZ, then up marginally around 10kHz. Question: Is this "cousin" to the HD-280 pro suitable for everyday or critical listening? Its response is definitely flatter where it counts - acc to the mfg, but i'm concerned about it's upper mid to high performance. It's definitely targeted at audiologists for hearing exams, but I thought abou this and said to myself "what better to listen to music critcally on than a set of cans designed to test peoples' hearing!" Absolutely NO reviews exist on-line for it, so any opinions, suggestions, experiences with it would be appreciated. -ChrisCoaster |
#2
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Sennheiser HDA-280 Audiometric Headphone
ChrisCoaster wrote:
Stumbled upon this by accident. Has peak SPL of 117dB(!) and most literature about it seems to indicate it is for testing frequency sensitivity strictly between 20Hz 12kHz. An audiometric headphone is likely to be designed for good outside sound attenuation and a short wearing time. Sennheiser specs it out to 20kHz. The graph on their site suggests ruler flat freq resp down to 100Hz, but above 2kHZ it seesaws(mostly downward, with a nasty trough around 5-7kHZ, then up marginally around 10kHz. My understanding is that response in the 2 to 8 kHz region depends also on the impedance of the actual ear-canal the headphone is loaded with and that some dip in measured headphone response in that region is to be expected. -ChrisCoaster Kind regards Peter Larsen |
#3
Posted to rec.audio.pro
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Sennheiser HDA-280 Audiometric Headphone
ChrisCoaster wrote:
Stumbled upon this by accident. Has peak SPL of 117dB(!) and most literature about it seems to indicate it is for testing frequency sensitivity strictly between 20Hz 12kHz. Yes. Sennheiser specs it out to 20kHz. The graph on their site suggests ruler flat freq resp down to 100Hz, but above 2kHZ it seesaws(mostly downward, with a nasty trough around 5-7kHZ, then up marginally around 10kHz. There are several different ways to measure headphone response, and they all give wildly different results above 8 Khz. I don't recall which method Sennheiser is currently using but it will affect things a lot. Question: Is this "cousin" to the HD-280 pro suitable for everyday or critical listening? Its response is definitely flatter where it counts - acc to the mfg, but i'm concerned about it's upper mid to high performance. It's definitely targeted at audiologists for hearing exams, but I thought abou this and said to myself "what better to listen to music critcally on than a set of cans designed to test peoples' hearing!" It may not be, because it is entirely possible that sacrifices have been made in impulse response and linearity in an attempt to get the flattest possible frequency response. It would be interesting to listen to, though, and I bet Sennheiser could get you an audition. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#4
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Sennheiser HDA-280 Audiometric Headphone
On Jan 30, 1:27*pm, (Scott Dorsey) wrote:
ChrisCoaster wrote: Stumbled upon this by accident. *Has peak SPL of 117dB(!) *and most literature about it seems to indicate it is for testing frequency sensitivity strictly between 20Hz 12kHz. Yes. Sennheiser specs it out to 20kHz. *The graph on their site suggests ruler flat freq resp down to 100Hz, but above 2kHZ it seesaws(mostly downward, with a nasty trough around 5-7kHZ, then up marginally around 10kHz. There are several different ways to measure headphone response, and they all give wildly different results above 8 Khz. *I don't recall which method Sennheiser is currently using but it will affect things a lot. Question: Is this "cousin" to the HD-280 pro suitable for everyday or critical listening? *Its response is definitely flatter where it counts - acc to the mfg, but i'm concerned about it's upper mid to high performance. *It's definitely targeted at audiologists for hearing exams, but I thought abou this and said to myself "what better to listen to music critcally on than a set of cans designed to test peoples' hearing!" It may not be, because it is entirely possible that sacrifices have been made in impulse response and linearity in an attempt to get the flattest possible frequency response. *It would be interesting to listen to, though, and I bet Sennheiser could get you an audition. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." _______________________ Impulse response? What is that as opposed to frequency response? -CC |
#5
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Sennheiser HDA-280 Audiometric Headphone
ChrisCoaster wrote:
Impulse response? What is that as opposed to frequency response? It's effectively the same thing in a system that has no distortion and is minimum phase. A lot of mechanical systems turn out not to be minimum phase. Group delay isn't audible, but ringing often is. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#6
Posted to rec.audio.pro
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Sennheiser HDA-280 Audiometric Headphone
Scott Dorsey wrote:
ChrisCoaster wrote: Impulse response? What is that as opposed to frequency response? It's effectively the same thing in a system that has no distortion and is minimum phase. A lot of mechanical systems turn out not to be minimum phase. Group delay isn't audible, but ringing often is. I should say, "Group delay isn't READILY audible..." --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#7
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Sennheiser HDA-280 Audiometric Headphone
On Jan 30, 4:38*pm, (Scott Dorsey) wrote:
Scott Dorsey wrote: ChrisCoaster wrote: Impulse response? *What is that as opposed to frequency response? It's effectively the same thing in a system that has no distortion and is minimum phase. *A lot of mechanical systems turn out not to be minimum phase. *Group delay isn't audible, but ringing often is. I should say, "Group delay isn't READILY audible..." --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." ___________________ Does the "damping factor" rating of an amp have something to do with that? -CC |
#8
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Sennheiser HDA-280 Audiometric Headphone
ChrisCoaster wrote:
Does the "damping factor" rating of an amp have something to do with that? Kind of. The speaker has all kinds of mechanical resonances in it... the damping factor is one way of thinking about the output impedance of the amplifier in terms of how well the amplifier controls the voice coil position with all these other mechanical things influencing it. For the most part damping factor is a non-issue since just about every amplifier you ever encounter has so low an output impedance that it doesn't matter unless you're trying to drive stupid loads. One place where it DOES matter is that there are older speakers out there that were designed to be driven by high impedance sources... they expect some lack of stiffness in the voice coil drive to get a flat response and if driven by a modern amplifier, the bass on an A-7 gets pretty recessed. Put a big 8 ohm power resistor in series with the speaker and the damping factor is reduced and the speaker sounds and measures flatter. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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