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17th October 2005, 23:39
Decibel (Loudness) Comparison Chart
Decibel (Loudness) Comparison Chart
Here are some interesting numbers, collected from a variety of sources, that help one to understand the volume levels of various sources and how they can affect our hearing.
Weakest sound heard 0dB
Normal conversation (3-5') 60-70dB
Telephone dial tone 80dB
City Traffic (inside car) 85dB
Train whistle at 500' 90dB
Subway train at 200' 95dB
Level at which sustained exposure may result in hearing loss
90 - 95dB
Power mower 107dB
Power saw 110dB
Pain begins 125dB
Pneumatic riveter at 4' 125dB
Jet engine at 100' 140dB
Death of hearing tissue 180dB
Loudest sound possible 194dB
OSHA Daily Permissible Noise Level Exposure
Hours per day Sound level
.25 or less 115dB
Perceptions of Increases in Decibel Level
Imperceptible Change 1dB
Barely Perceptible Change 3dB
Clearly Noticeable Change 5dB
About Twice as Loud 10dB
About Four Times as Loud 20dB
Sound Levels of Music
Normal piano practice 60 -70dB
Fortissimo Singer, 3' 70dB
Chamber music, small auditorium 75 - 85dB
Piano Fortissimo 84 - 103dB
Violin 82 - 92dB
Cello 85 -111dB
Flute 92 -103dB
Piccolo 90 -106dB
Clarinet 85 - 114dB
French horn 90 - 106dB
Trombone 85 - 114dB
Tympani & bass drum 106dB
Walkman on 5/10 94dB
Symphonic music peak 120 - 137dB
Amplifier rock, 4-6' 120dB
Rock music peak 150dB
* One-third of the total power of a 75-piece orchestra comes from the bass drum.
* High frequency sounds of 2-4,000 Hz are the most damaging. The uppermost octave of the piccolo is 2,048-4,096 Hz.
* Aging causes gradual hearing loss, mostly in the high frequencies.
* Speech reception is not seriously impaired until there is about 30 dB loss; by that time severe damage may have occurred.
* Hypertension and various psychological difficulties can be related to noise exposure.
* The incidence of hearing loss in classical musicians has been estimated at 4-43%, in rock musicians 13-30%.
Statistics for the Decibel (Loudness) Comparison Chart were taken from a study by Marshall Chasin , M.Sc., Aud(C), FAAA, Centre for Human Performance & Health, Ontario, Canada. There were some conflicting readings and, in many cases, authors did not specify at what distance the readings were taken or what the musician was actually playing. In general, when there were several readings, the higher one was chosen.
19th October 2005, 23:52
Re: Decibel (Loudness) Comparison Chart
Cuma mau nambahin (tapi rasanya sudah pada tahu ya) kalau secara teori setiap kenaikan sebesar 3dB butuh power 2 kali lipat. Kalau misalnya ada suara sebesar 90dB butuh tenaga 10 watt, biar level-nya jadi 93dB harus diberi tenaga 20 watt. Kalau dinaikkan lagi jadi 96dB, harus diberi 40 watt, dan kalau mau mencapai 99dB harus dikasih 80 watt.
Originally Posted by andersen
Menarik...bahwa untuk bikin suara yg kita anggap dua kali lebih keras dari patokan awal ternyata butuh daya yg besar sekali. Sementara sistem kelistrikan mobil terbatas, hanya 12 volts dan antara 60-90 amperes (tergantung alternator dan mobil). Kapan ya, mobil itu tegangannya 42 volts? Enak tuh, jadi gak butuh current besar. Otomatis current draw dari komponen listrik di mobil nggak bakal kayak sekarang, otomatis untuk audio reserve tenaga banyak. Bayangin head unit mobil punya built-in power 4x100 watts RMS...bisa2 amplifier eksternal nggak laku...
20th October 2005, 01:39
bodapa: Bos.. coba elo liat di forum subwoofer mengenai MTX Jackhammer (video).. 1pc of 22" subwoofer powered about 5000W RMS. needs 3 optima yellow top batteries, 6 capacitors
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