When modeling enclosures, what db would be considered very good? when i model using hornresp i may be lucky to get up to 95 or 100 db. Is this going to be a loud box? I can model a 6th order enclosure in term lab pro and it show me db around 130. Is there a different scale in hornresp? What is the goal? I dont want to waste time building an enclosure and then it not be as loud or louder than what i can easily already make.
HR's dBspl is at the standard 1 m.
'Loud' is relative depending on ones hearing, room acoustics, local noise restrictions, but in general; discomfort, pain thresholds are 120, 130 dB.
Today's reference for HT is the THX reference, though increasingly it's for HIFI also:
mains, surrounds = 85 dB/m [3.28084 ft] with 20 dB dynamic headroom = 105 dB
LFE = 85 dB/m [3.28084 ft] with 30 dB dynamic headroom = 115 dB
The following from dim memory just to get you started, so best to find an online calculator to confirm/correct:
These are at the listening position, so if 4 m [13.1234 ft] away, then 4 - 1 = 3 m and since sound power falls at -6 dB/doubling of distance = ln[3/1]/ln[2] = 1.585 * 6 = ~9.51 dB is added to 105, 115 dB or whatever limit you choose based on max power available or personal preference.
Of course most DIYers either ignore it or just quickly approximates it.
Note that stereo only adds ~ +3 dB as opposed to summing two drivers = ~ +6 dB.
'Loud' is relative depending on ones hearing, room acoustics, local noise restrictions, but in general; discomfort, pain thresholds are 120, 130 dB.
Today's reference for HT is the THX reference, though increasingly it's for HIFI also:
mains, surrounds = 85 dB/m [3.28084 ft] with 20 dB dynamic headroom = 105 dB
LFE = 85 dB/m [3.28084 ft] with 30 dB dynamic headroom = 115 dB
The following from dim memory just to get you started, so best to find an online calculator to confirm/correct:
These are at the listening position, so if 4 m [13.1234 ft] away, then 4 - 1 = 3 m and since sound power falls at -6 dB/doubling of distance = ln[3/1]/ln[2] = 1.585 * 6 = ~9.51 dB is added to 105, 115 dB or whatever limit you choose based on max power available or personal preference.
Of course most DIYers either ignore it or just quickly approximates it.
Note that stereo only adds ~ +3 dB as opposed to summing two drivers = ~ +6 dB.